🍳 Smash Burger Sauce
A smash patty is thin, screaming hot and rich, and it flattens whatever sits under it. A thick, sweet spread just gets squeezed out the sides on the first bite, which is why this sauce is built looser than the others here — closer to a dressing than a spread. The ketchup is cut back to a couple of teaspoons and the acid is doubled with pickle brine and vinegar, so it stays sharp against all that browned fat and spreads in a thin, even film that the hot bun absorbs.
🧾 Smash Burger Sauce — Recipe Card
From I Love Hamburger — ilovehamburger.com
Ingredients
- ½ cup mayonnaise (115 g)
- 1 tbsp yellow mustard (15 ml)
- 1 tbsp dill pickle brine (from the jar) (15 ml)
- 2 tsp white vinegar (10 ml)
- 2 tsp ketchup (10 ml)
- 1 tbsp finely minced dill pickle (12 g)
- ¼ tsp garlic powder (0.5 g)
- ¼ tsp coarse black pepper (0.5 g)
Instructions
- Whisk the mayonnaise and mustard together, then add the pickle brine and vinegar a teaspoon at a time, whisking between additions. Added slowly the sauce stays glossy; dumped in at once it can look curdled.
- Stir in the ketchup, minced pickle, garlic powder, and black pepper.
- Check the consistency: it should ribbon off a spoon and settle back into itself within a second or two. If it holds a peak, add another teaspoon of brine.
- Chill 15 minutes, then spread a thin layer on the toasted bun before the patty lands — the residual heat pulls it into the crumb instead of letting it slide.
🫙 Storage
Airtight in the fridge for up to 1 week. It thickens noticeably as it chills, so stir in a teaspoon of pickle brine to bring it back to spreading consistency before use.
🔁 Substitutions
- Dijon in place of yellow mustard makes it sharper still, with less of the bright diner-yellow color.
- No pickle brine? Use 1 tbsp water, 1 tsp extra vinegar, and a good pinch of salt — brine is essentially salty, sour water with dill in it.
- Leave the ketchup out entirely for a fully mustard-forward version that eats like an old-fashioned diner dressing.
🍔 What to put it on
Pair it with American cheese, thin raw onion, and extra dill pickles. It especially shines on these burgers:
Burger HQ Picks Handy for sauce-making
Squeeze Bottles & Mixing Bowl Set
Mix a sauce in the bowl, decant into a squeeze bottle, and you get an even stripe on every bun instead of a spoon-blob. Also what keeps a topping bar tidy.
Check price →Small Silicone Whisk & Spatula Set
A small whisk emulsifies a mayo-based sauce properly in seconds; the spatula gets every last bit out of the bowl.
Check price →As an affiliate site, I Love Hamburger may earn a commission from qualifying purchases. This does not affect our recommendations.
Frequently asked questions
How is smash burger sauce different from regular burger sauce?
Two things: it is sharper, and it is thinner. Our classic burger sauce is a thick, gently sweet spread; this one cuts the ketchup back to a couple of teaspoons and adds brine and vinegar until it pours. The thinness matters as much as the tang — a smash patty compresses the bun as you bite, and a thick sauce ends up on your fingers rather than in the burger.
How thin is too thin?
It should ribbon off a spoon and level out in a second or two. If it runs like water it will soak straight through the bun, so hold back on the brine; if it holds a peak, it is still a spread rather than a smash sauce and needs another teaspoon.
Why add pickle brine instead of more vinegar?
Brine brings acidity and salt together, so you can loosen the sauce without watering down the seasoning the way plain vinegar does. It also echoes the pickles on the burger, which makes the whole thing taste more of a piece.