Set out all your ingredients before you begin. Measure the mayonnaise, both mustards, honey, and lemon juice into small bowls. Having everything ready makes the mixing quick and mess-free.
Spoon 1/2 cup of mayonnaise into your medium mixing bowl. Use a spatula to scrape the measuring cup clean. This creamy base holds the whole sauce together.
Add 2 tablespoons of yellow mustard and 1 tablespoon of Dijon mustard to the bowl. Together, they give this Dijon mustard dipping sauce recipe its balanced tang. Stir gently so the mustards start blending into the mayo.
Drizzle 2 tablespoons of honey over the mustard mixture. If your honey is thick, warm the spoon under hot water first. The honey adds the sweet finish that makes this sauce so addictive.
Squeeze in 1/2 tablespoon of fresh lemon juice. It cuts through the richness and keeps the sauce tasting light. Please do not skip it, because it makes every flavor pop.
Whisk everything together until you see no streaks of mustard or honey. The sauce should look silky and pale golden. Take a quick taste to make sure the balance feels right to you.
Move the sauce into an airtight container and cover it well. Chill it in the refrigerator overnight so the flavors can melt together. I find the taste is much deeper and rounder after this rest.
Give the chilled sauce one good stir before serving. Spoon it into a small bowl and set it out with your favorite snacks. It is now ready to dip, drizzle, or spread.