Welcome to Slice Theory, a trusted Pizza Restaurant in Ashburn, VA, where great food and friendly service come together. With a 4.80-star rating from 311 reviews, we’re proud to serve guests looking for fresh pizza and memorable meals.
At Slice Theory, our Pizza Restaurant in Ashburn, VA is known for quality ingredients, warm hospitality, and a relaxed dining experience. Rated 4.80 by 311 reviews, we also offer great service and quality and accessible facilities to make every visit easy and enjoyable.
If you’re searching for a standout Pizza Restaurant in Ashburn, VA, Slice Theory is a great place to satisfy your pizza cravings. Backed by a 4.80-star rating and 311 reviews, we combine delicious flavors, convenient service, and a welcoming atmosphere.
Our Specialties
Every dish tells a story. Explore our carefully curated menu featuring seasonal favorites and signature creations.
Our chef's signature creations featuring locally-sourced ingredients and innovative culinary techniques.
We partner with local farmers and suppliers to bring you the freshest seasonal ingredients every day.
Every plate is prepared with attention to detail, combining traditional recipes with modern presentation.
Our Story
Welcome to a place where great food meets warm hospitality. We believe dining is more than just a meal - it's an experience to be savored and shared.
Our kitchen is dedicated to creating dishes that bring people together, using recipes that honor tradition while embracing innovation.
Photos
A glimpse of our restaurant experience
Food & Drinks
Rich butter chicken sauce, grilled chicken, mozzarella, sweet peppers, roasted tomatoes, red onion, cilantro with a squeeze of lime.
Tomato Sauce, Cup Pepperoni, Fresh Basil, Stracciatella, Mikes Hot Honey Drizzle
Garlic Cream Sauce, Ricotta, Cup Pepperoni, Mike's Hot Honey Drizzle.
Yukon Potatoes Tossed in Buffalo Dry Seasoning. Served with a Side of Ranch or Blue Cheese, House Buffalo Sauce, Carrots and Celery.
Garlic Cream Sauce, Mozzarella Cheddar Blend, Roasted Mushrooms, Calabrian Truffle Chili Crisp
Mozzarella (x2), Tomato Sauce, Parmesan, Fresh Oregano. Every great Theory Starts Simple
Pepperoni, Cup Pepperoni, Mozzarella, Parm, Tomato sauce, Fresh Oregano. A self-evident truth wrapped in crispy crust.
Pepperoni, Italian Sausage, Green Peppers, Red Onions, Roasted Mushrooms, Tomato sauce, Parm, Mozzarella Fresh Oregano. The multiverse of meat and veggies collapsed into your mouth.
Shaved Ham, Ginger Pineapple, Mozzarella, Tomato Sauce, Parm, Fresh Parsley. A controversial equation, banned in 6 galaxies. Loved in this.
Four Meats. One bite that started it all (and ended your diet). Pepperoni, Italian Sausage, Applewood Bacon, Shaved Ham, Mozzarella, and Fresh Oregano.
Balsamic Tomatoes, Parmesan, Fresh Basil, Mozzarella, Stracciatella. The Margherita that graduated top of its class.
Garlic Cream Sauce, Whipped Ricotta, Parmesan, Mozzarella, Fresh Parsley. A cheesy creamy loop that never ends, thankfully.
Balsamic Tomatoes, Sautéed Spinach, Roasted Mushrooms, Red Onions, Parm, Tomato Sauce, Mozzarella. Pizza's so green, it photosynthesizes.
A chain reaction of smoky-sweet satisfaction. Balsamic BBQ Sauce, Grilled Chicken, Red Onion, Mozzarella, Fresh Cilantro.
Zoom in, zoom out -- it's Buffalo Chicken all the way down. Fried Chicken, Red Onions, Mozz-Ched Blend, Parmesan, Garlic Cream Sauce, Buffalo Drizzle, (Your Choice of Ranch or Blue Cheese Drizzle)
Garlic Cream Sauce, Ricotta, Cup Pepperoni, Mike's Hot Honey Drizzle.
Garlic Cream Sauce, Mozzarella Cheddar Blend, Roasted Mushrooms, Calabrian Truffle Chili Crisp
Rich butter chicken sauce, grilled chicken, mozzarella, sweet peppers, roasted tomatoes, red onion, cilantro with a squeeze of lime.
You be the Scientist, and create your own formula.
Every great Theory Starts Simple Mozzarella (x2), Tomato Sauce, Parmesan, Fresh Oregano.
Pepperoni, Cup Pepperoni, Mozzarella, Parm, Tomato sauce, Fresh Oregano. A self-evident truth wrapped in crispy crust.
Pepperoni, Italian Sausage, Green Peppers, Red Onions, Roasted Mushrooms, Tomato sauce, Parm, Mozzarella Fresh Oregano. The multiverse of meat and veggies collapsed into your mouth.
Shaved Ham, Ginger Pineapple, Mozzarella, Tomato Sauce, Parm, Fresh Parsley. A controversial equation, banned in 6 galaxies. Loved in this.
Pepperoni, Italian Sausage, Applewood Bacon, Shaved Ham, Mozzarella, Parm, Fresh Oregano. Four Meats. One bite that started it all (and ended your diet).
Balsamic Tomatoes, Parmesan, Fresh Basil, Mozzarella, Stracciatella. The Margherita that graduated top of its class.
Garlic Cream Sauce, Whipped Ricotta, Parmesan, Mozzarella, Fresh Parsley. A cheesy creamy loop that never ends, thankfully.
Balsamic Tomatoes, Sautéed Spinach, Roasted Mushrooms, Red Onions, Parm, Tomato Sauce, Mozzarella. Pizza's so green, it photosynthesizes.
Garlic Cream Sauce, Balsamic BBQ Sauce, Grilled Chicken, Grilled Red Onion, Cheddar Mozz Blend, Fresh Cilantro. A chain reaction of smoky-sweet satisfaction.
Fried Chicken, Grilled Red Onions, Mozz-Ched Blend, Garlic Cream Sauce, Buffalo Drizzle, (Your Choice of Ranch or Blue Cheese Drizzle). Zoom in, zoom out -- it's Buffalo Chicken all the way down.
Can't choose between all the choices, get two different pies?
You be the Scientist, and create your own formula.
Mozzarella (x2), Tomato Sauce, Parmesan, Fresh Oregano. Every great Theory Starts Simple
Pepperoni, Cup Pepperoni, Mozzarella, Parm, Tomato sauce, Fresh Oregano. A self-evident truth wrapped in crispy crust.
Pepperoni, Italian Sausage, Green Peppers, Red Onions, Roasted Mushrooms, Tomato sauce, Parm, Mozzarella Fresh Oregano. The multiverse of meat and veggies collapsed into your mouth.
Shaved Ham, Ginger Pineapple, Mozzarella, Tomato Sauce, Parm, Fresh Parsley. A controversial equation, banned in 6 galaxies. Loved in this.
Pepperoni, Italian Sausage, Applewood Bacon, Shaved Ham, Mozzarella, Parm, Fresh Oregano. Four Meats. One bite that started it all (and ended your diet).
Balsamic Tomatoes, Parmesan, Fresh Basil, Mozzarella, Stracciatella. The Margherita that graduated top of its class.
Garlic Cream Sauce, Whipped Ricotta, Parmesan, Mozzarella, Fresh Parsley. A cheesy creamy loop that never ends, thankfully.
Balsamic Tomatoes, Sautéed Spinach, Roasted Mushrooms, Red Onions, Parm, Tomato Sauce, Mozzarella. Pizza's so green, it photosynthesizes.
Garlic Cream Sauce, Balsamic BBQ Sauce, Grilled Chicken, Grilled Red Onion, Cheddar Mozz Blend, Fresh Cilantro. A chain reaction of smoky-sweet satisfaction.
Fried Chicken, Grilled Red Onions, Mozz-Ched Blend, Garlic Cream Sauce, Buffalo Drizzle, (Your Choice of Ranch or Blue Cheese Drizzle). Zoom in, zoom out -- it's Buffalo Chicken all the way down.
Can't choose between all the choices, get two different pies?
You be the Scientist, and create your own formula.
Mozzarella (x2), Tomato Sauce, Parmesan, Fresh Oregano. Every great Theory Starts Simple
Pepperoni, Cup Pepperoni, Mozzarella, Parm, Tomato sauce, Fresh Oregano. A self-evident truth wrapped in crispy crust.
Pepperoni, Italian Sausage, Green Peppers, Red Onions, Roasted Mushrooms, Tomato sauce, Parm, Mozzarella Fresh Oregano. The multiverse of meat and veggies collapsed into your mouth.
Shaved Ham, Ginger Pineapple, Mozzarella, Tomato Sauce, Parm, Fresh Parsley. A controversial equation, banned in 6 galaxies. Loved in this.
Pepperoni, Italian Sausage, Applewood Bacon, Shaved Ham, Mozzarella, Parm, Fresh Oregano. Four Meats. One bite that started it all (and ended your diet).
Balsamic Tomatoes, Parmesan, Fresh Basil, Mozzarella, Stracciatella. The Margherita that graduated top of its class.
Garlic Cream Sauce, Whipped Ricotta, Parmesan, Mozzarella, Fresh Parsley. A cheesy creamy loop that never ends, thankfully.
Balsamic Tomatoes, Sautéed Spinach, Roasted Mushrooms, Red Onions, Parm, Tomato Sauce, Mozzarella. Pizza's so green, it photosynthesizes.
Garlic Cream Sauce, Balsamic BBQ Sauce, Grilled Chicken, Grilled Red Onion, Cheddar Mozz Blend, Fresh Cilantro. A chain reaction of smoky-sweet satisfaction.
Grilled Chicken, Grilled Red Onions, Mozz-Ched Blend, Garlic Cream Sauce, Buffalo Drizzle, (Your Choice of Ranch or Blue Cheese Drizzle). Zoom in, zoom out -- it's Buffalo Chicken all the way down.
You be the Scientist, and create your own formula.
Mozzarella (x2), Tomato Sauce, Parmesan, Fresh Oregano. Every great Theory Starts Simple
Pepperoni, Cup Pepperoni, Mozzarella, Parm, Tomato sauce, Fresh Oregano. A self-evident truth wrapped in crispy crust.
Pepperoni, Italian Sausage, Green Peppers, Red Onions, Roasted Mushrooms, Tomato sauce, Parm, Mozzarella Fresh Oregano. The multiverse of meat and veggies collapsed into your mouth.
Shaved Ham, Ginger Pineapple, Mozzarella, Tomato Sauce, Parm, Fresh Parsley. A controversial equation, banned in 6 galaxies. Loved in this.
Pepperoni, Italian Sausage, Applewood Bacon, Shaved Ham, Mozzarella, Parm, Fresh Oregano. Four Meats. One bite that started it all (and ended your diet).
Balsamic Tomatoes, Parmesan, Fresh Basil, Mozzarella, Stracciatella. The Margherita that graduated top of its class.
Garlic Cream Sauce, Whipped Ricotta, Parmesan, Mozzarella, Fresh Parsley. A cheesy creamy loop that never ends, thankfully.
Balsamic Tomatoes, Sautéed Spinach, Roasted Mushrooms, Red Onions, Parm, Tomato Sauce, Mozzarella. Pizza's so green, it photosynthesizes.
Garlic Cream Sauce, Balsamic BBQ Sauce, Grilled Chicken, Grilled Red Onion, Cheddar Mozz Blend, Fresh Cilantro. A chain reaction of smoky-sweet satisfaction.
Grilled Chicken, Grilled Red Onions, Mozz-Ched Blend, Garlic Cream Sauce, Buffalo Drizzle, (Your Choice of Ranch or Blue Cheese Drizzle). Zoom in, zoom out -- it's Buffalo Chicken all the way down. all the way down.
Can't choose between all the choices, get two different pies?
Arcadian mixed greens, seasonal veggies, house-made ranch.
Romaine hearts, heirloom tomatoes, bacon, parmesan, Caesar dressing.
Heirloom tomatoes, fresh basil, burrata, balsamic glaze.
Trio of Italian Meats, Provolone, Chickpeas, Heirloom Tomatoes, Kalamata Olives, Shaved Parm, and Green Peppers, Served with a Red Wine Vinaigrette.
Arcadian mixed greens, seasonal veggies, house-made ranch.
Romaine hearts, heirloom tomatoes, bacon, parmesan, Caesar dressing.
Heirloom tomatoes, fresh basil, burrata, balsamic glaze.
Trio of Italian Meats, Provolone, Chickpeas, Heirloom Tomatoes, Kalamata Olives, Shaved Parm, and Green Peppers, Served with a Red Wine Vinaigrette.
Arcadian mixed greens, seasonal veggies, house-made ranch. (8-12 People)
Romaine hearts, heirloom tomatoes, bacon, parmesan, Caesar dressing. (8-12 People)
Heirloom tomatoes, fresh basil, burrata, balsamic glaze. (8-12 People)
Trio of Italian Meats, Provolone, Chickpeas, Heirloom Tomatoes, Kalamata Olives, Shaved Parm, and Green Peppers, Served with a Red Wine Vinaigrette.
Arcadian mixed greens, seasonal veggies, house-made ranch. (20-25 People)
Romaine hearts, heirloom tomatoes, bacon, parmesan, Caesar dressing. (20-25 People)
Heirloom tomatoes, fresh basil, burrata, balsamic glaze. (20-25 People)
Trio of Italian Meats, Provolone, Chickpeas, Heirloom Tomatoes, Kalamata Olives, Shaved Parm, and Green Peppers, Served with a Red Wine Vinaigrette.
Classic garlic breadsticks with parmesan served with Marinara.
House-made garlic butter spread, cheddar blend, herbs, marinara.
Buffalo garlic, BBQ jerk, honey chipotle, maple sriracha, garlic parmesan.
Buffalo garlic, BBQ jerk, honey chipotle, maple sriracha, garlic parmesan.
Buffalo garlic, BBQ jerk, honey chipotle, maple sriracha, garlic parmesan.
House-made Chips. Sea Salt
Yukon Potatoes, Sea Salt
Yukon Potatoes Tossed in Buffalo Dry Seasoning. Served with a Side of Ranch or Blue Cheese, House Buffalo Sauce, Carrots and Celery.
Dip it up.
Seasonings for your pizza
3 or 5 tenders served with Yukon Gold Fries. Your choice of dip.
5 Mozz Sticks Served With Marinara.
Shaved ribeye, provolone or Cheese Wiz sauce, grilled, mushrooms and onions on a toasted roll. Served with Chips
Hot Honey Garlic Thick cut Bacon, lettuce, tomatoes, mayo. Served with Chips
Marinara, mozzarella, and three toppings of choice. Served with Chips
Provolone, Pepperoni, Hot Coppa, Genoa Salami, Prosciutto, Bibb lettuce, tomato, red wine vinaigrette. Served with Chips.
Ham, Turkey Breast, Bacon, Provolone, Mayo, Bibb Lettuce, Tomato. Served with chips.
2 Chicken Tenders Drenched in Buffalo Sauce, Wrapped in a warm tortilla with Mozzarella and Romaine. Your Choice of Ranch or Blue Cheese Dressing.
Grilled Chicken, Caramelized Onions, Provolone, Mayo
Soft, warm & impossible to resist. A mystery of chocolate, solved in every bite.
Dense, pudgy & dangerously delicious. Once you start, there's no turning back.
A Sugary supernova trapped in buttercream gravity cake.
Tiny particles of citrus flavor collide in perfect balance. Tangy lemon curd layered on crisp shortbread, topped with powdered sugar.
A Swirl of Nutella, Marshmallow, Graham Cracker & Hershey's Chocolate orbiting in harmony. Pure gravitational pull for your sweet tooth.
2 Tenders with Yukon Gold Fries. Your Choice of Dip.
All Beef Hot Dog, Ketchup and Mustard on the side Comes with House-made Potato Chips.
Quesadilla with Mexican Blended Cheese, Served with a side of salsa and Sour Cream
Chicken tender, Romaine, Tomato, Cheddar blend, Wrapped in a Grilled Tortilla. Your Choice of Dressing. Homemade Chips.
20 oz Deer Park Bottle
Assorted Coke Products
Coca-Cola Original Taste — the crisp, refreshing taste you know and love
Hear from our valued guests
Like eating pizza and watching hockey? Or just need a quick hot-n-ready slice? You can do that here! This place is inside the Ashburn Ice House. They also have plenty of TV's to watch other things. Pizza is delicious, and is one of my favorite pies in the area. I'm from Connecticut, the Pizza Capital of the USA, so I have high standards. Fries are delicious. Also I love their Caesar wrap. Great beer on tap (I love Dr. Juicy IPA), wine available, great liquor selection (especially for a spot that occupies what would be a rink snack bar). Coffee and tea available to warm up. Cooler drinks are cheaper than the vending machines in the rink. Sid and Rob, the owners/operators, are super friendly and talented cooks.
Enthusiastic bar tender offered us a slice of experimental pizza free of charge. 9.5/10 pizza, needs more hot honey. 10/10 experience, very personable staff.
Highly recommend Slice Theory. The staff is very friendly and personable. Sid somehow remembers everyone when they walk in, and you instantly feel like you're seeing an old friend. Our family has only tried a handful of foods, but the #1, in my opinion, is the Steak & Cheese (with the Wiz cheese, of course). Other family favs are the buffalo chicken tenders, chicken caesar wrap, and the breadsticks are delicious! Food never takes long, and quality is never compromised. Thanks for caring about your patrons and being passionate about your business, Sid and Rob!
Such a lovely place! The staff is incredibly kind and you can tell they really care about what they do. The pizza was absolutely delicious – amazing crust, high-quality ingredients, and a great variety of options for every taste. You can feel the heart and soul behind this business, it’s not just a restaurant – it’s something built with passion. I truly hope they succeed, they deserve all the support!
Hidden gem! So happy I discovered this place. You can tell they put a lot of care into everything and use high quality ingredients. The owner is the sweetest too. And if you’re into whiskey, they have a very very generously priced whiskey selection.
Located in a hidden spot but such a good find!! Slice theory is connected to an ice rink and serves up unique slices of pizza along with an extensive whiskey menu and salads and stuff too. Went after 9:30pm and got 4 slices for 6 dollars through flavorsavr!! The owner was super nice and very passionate and told us about the discount which is a company they partner with to reduce food waste. Pizza had a crispy crust and a lot of toppings. We had a great conversation with him, such a great local spot, def coming here again!
This pizza was absolutely phenomenal! The ingredients are fresh, the dough is perfect, and it was cooked to perfection. I only stopped to grab a drink and had to take piece to go because it was so yummy looking! I like to eat pizza everywhere that I travel and this is going on my list of favorites! Stop by and say hi to Sid and grab a slice. *** Update returned** grabbed a local beer and tried much more food. The BBQ Jerk wings unbelievable! Had the Nashville Wings, cheesesteak, fries, BBQ chicken pizza, and smores pizza for dessert. Everything is truly incredible. A must stop when I in the area.
This place is amazing and has great food!! Has great parking as well and located near an ice rink so perfect place to go on a date. Or you could bring your whole family they have something for everyone. The owner is very charismatic and you could tell he truly cares about the customer. I really really enjoyed all the various gourmet style pizzas and wings that they have highly recommend if you’re ever in the area.
Came in with a group of friends Owner was able to accommodate us by giving us two booths next to each other. The pizza here is amazing. I really like all of their gourmet style options and flavors for a very fair and reasonable price. They have a great atmosphere for watching sports and hanging out with your buddies. We got a couple pictures of beer, And a whole bunch of pizzas. Overall, I had an amazing experience here will definitely come back again!!!
Had an amazing time here with my family. I love all their gourmet style pizza recipes and all the unique flavors! It’s located right next to an ice rink so a great date stop. Great atmosphere to bring children. Their prices are very reasonable and they have great parking. 12/10 Would definitely come back here again soon.
Common questions about Slice Theory
Slice Theory is located at Inside Ashburn Ice House, 21595 Smith Switch Rd Unit B, Suite B, Ashburn, VA 20147, United States, Ashburn, VA, United States.
You can reach Slice Theory by calling +1 571-291-2025.
Slice Theory has a rating of 4.8 out of 5 based on 311 customer reviews.
Slice Theory features the following accessibility: Wheelchair-accessible car park, Wheelchair-accessible entrance.
Slice Theory features the following service options: Kerbside pickup, No-contact delivery, Delivery, Drive-through, On-site services, Takeaway, Dine-in.
Slice Theory features the following highlights: Fast service, Sport.
Slice Theory features the following popular for: Lunch, Dinner, Solo dining.
Slice Theory features the following offerings: Alcohol, Beer, Coffee, Comfort food, Quick bite, Spirits, Vegan options, Vegetarian options.
Slice Theory features the following dining options: Lunch, Dinner, Catering, Counter service, Dessert, Seating.
Slice Theory features the following amenities: Bar on site, Restroom.
Slice Theory features the following atmosphere: Casual.
Slice Theory features the following crowd: Family friendly, Groups, LGBTQ+ friendly.
Slice Theory features the following payments: Credit cards, Debit cards, NFC mobile payments.
Slice Theory features the following children: Good for kids, Kids' menu.
Slice Theory features the following parking: Free parking lot, Free street parking, On-site parking, Plenty of parking.
Business Features
We look forward to welcoming you. Make a reservation or stop by - walk-ins welcome!
Request a table and we'll confirm your booking shortly.
