Going the extra mile
This is an extended delivery order. Delivery times and fees may be higher.
About Flat Out - Smash Burgers - Royal Docks
Expertly smashed, just for you. Your Flat Out journey begins at the iconic crispy edge of our patties, taking you on a tantalising trip to a juicy centre. We keep the toppings simple, delicious and customisable for you. We use quality certified British & Irish beef that's sourced carefully to halal standards - because we believe everyone should be able to enjoy our proper smashed burgers. Choose between one, two, three, four and even TEN patties - how high will you go?
Buy 1, get 1 free
Add 2 of the same item to your basket for the price of one – T&Cs apply. New customers only.
Double Cheeseburger
Highly rated· Currently sold out£8.90Buy 1, get 1 free
Meal Deals 🤑
Fun, love & burgers. Oh, and your choice of sides and drinks too.
The Flat Out Combo
Highly rated· Currently sold out£14.50Singles Feast
Currently sold out£17.00PopularThe Flat Out Feast
Currently sold out£28.90
New Burger ✨
Try our brand new burger!
Truffle Burger
Currently sold out£9.99Popular
Special Burgers 🍂
Try our two special smash burgers: expertly crafted, bold, and delicious—here for a limited time only!
Spicy Jalapeño Burger
Currently sold out£10.50BBQ Onion Burger
Currently sold out£10.50
Classic Burgers 🍔
Burgers that are smashed for flavour and texture. How high will you go?
Double Cheeseburger
Highly rated· Currently sold out£8.90Buy 1, get 1 freeSingle Cheeseburger
Currently sold out£6.90PopularTriple Cheeseburger
Highly rated· Currently sold out£11.90Quadruple Cheeseburger
Currently sold out£14.90
Vegan Burgers 🌱
Savor the flavor-packed delight of our Vegan Smash Burger, a plant-based patty cooked to perfection and bursting with taste in every bite.
Vegan Double Cheeseburger 🌱
Indulge in our Vegan Double Smash Burger, a plant-based delight that doesn't compromise on flavor. Featuring two perfectly seasoned, crispy-edged vegan patties, topped with refreshing pickles, crunchy onions and a tangy vegan special sauce. All this goodness is sandwiched between a toasted, soft vegan bun.£9.90PopularVegan Triple Cheeseburger 🌱
Treat yourself to the ultimate plant-based feast with our Triple Vegan Smash Burger! This towering creation features three juicy, perfectly smashed vegan patties, each layered with melted vegan cheese. Topped with tangy pickled gherkins and diced onions, all nestled in a soft, toasted vegan bun.£12.90
THE FLAT OUT CHALLENGE 💪
A burger to end all burgers. Post a before & after shot on your Instagram story, tag @flatoutburgersuk, and you'll receive £10 off your next order. That's a pound for every patty! Do you have what it takes?
Ten Patty Cheeseburger Challenge
Currently sold out£29.90
Sides 🍟
Beige but beautiful.
House Waffle Fries
Death to soggy chips. Long live crispy waffle fries - lightly seasoned with salt because that's all you need.£3.90Hot Waffle Fries
Dusted in our house seasoning to give you that kick you're craving when you're going flat out.£3.90Cheeseburger Waffle Fries
Currently sold out£9.00House Tater Tots
Pure nostalgia. Like hash browns, but so much better.£3.90Gooey Mac & Cheese Bites
Bites of macaroni pasta - crumbed & coated in our original seasoning and oozing with mature cheddar cheese inside. Naughty.£4.50Hot 'n' Gooey Mac & Cheese Bites
Bites of macaroni pasta - crumbed & coated in our HOT seasoning and oozing with mature cheddar cheese inside. Do yourself a favour and dunk these in some of our ranch or house sauce.£4.50Hot Tater Tots
Tater tots tossed in our house seasoning.Top tip: best enjoyed dunked in our ranch or house sauce.£3.90
Sauces & Dips 🍅
Dunk away.
House Sauce
Our secret house sauce. It's creamy. It's tangy. It's addictive.£0.90Cajun Ranch Sauce
House-made, smoky, creamy and blackened with cajun seasoning. A Flat Out team favourite.£0.90Ketchup
Heinz. Say no more.£0.90Mustard
£0.90
Drinks 🥤
The classics only.
Coke Zero
The OG minus the sugar.£2.25Rubicon Mango
Rich in vitamin C, apparently.£2.25Coke
The OG.£2.25Fanta Orange
Fizzy orange for that juicy fix.£2.25Sprite
Fun fact: our lowest selling drink. Show it some love.£2.25
Dessert 🍦
Finish on something sweet.
Churros
Caramel-filled churros with a rich chocolate dipping sauce. A perfect, sweet finishing touch!£4.90
