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In-N-Out burger spread

Sometimes I’m craving a diner-style griddle burger with a classic hamburger sauce. This is a fairly close match to a popular burger chain that hasn’t made it to our region yet.

Ingredients

  • 120 ml mayonnaise (½ cup)
  • 3 tablespoons ketchup
  • ½ teaspoon yellow mustard
  • 1 tablespoon white vinegar
  • 2 teaspoons sweet pickle relish
  • 2 teaspoons sugar
  • 2 teaspoons finely minced white onion
  • ¼ teaspoon paprika
  • 0.1 g MSG (a smidgen, about 1/32 teaspoon; 0.05% of total weight)
  • Salt and pepper, to taste

Method

Combine the mayonnaise, ketchup, mustard, vinegar, relish, sugar, onion, paprika, and MSG in a mixing bowl. Stir until uniform in colour with no streaks of ketchup or mustard visible.

Taste and adjust with salt and pepper.

Cover and refrigerate at least 1 hour, until the onion and pickle flavours have mellowed into the base.

To serve

Spread on burger buns, use as a sandwich spread, or serve as a dip for fries.

Notes

  • 0.05% MSG by weight is small enough that a kitchen scale is the only reliable way to measure it; volume spoons this small (smidgen, drop) are approximate.
  • Keeps refrigerated about 1 week in a sealed container.
Sourceoriginal
Makesabout 1 cup (250 ml)
Prep10 min
Total1 hr 10 min (mostly chilling)
DateJuly 7, 2026
UpdatedOctober 14, 2026