Mix the base: In a medium mixing bowl, add mayonnaise, Dijon mustard, white vinegar, and lemon juice. Whisk them together until the mixture turns silky and slightly fluffy. This combination creates that signature tangy-smooth foundation of the Whataburger sauce.

Season and blend: Add the crushed black pepper, garlic powder, onion powder, smoked paprika, cayenne pepper (if you like a kick), and sugar. Stir slowly but thoroughly, ensuring each spice is evenly distributed. You’ll notice the sauce thickening slightly as the pepper and paprika mix in.

Taste and adjust: Dip a spoon in and taste — if it feels too tangy, add a bit more sugar or honey. If you want a deeper smoky flavor, increase the paprika slightly. Adjust the salt depending on your preference.

Heat for flavor melding: For a richer, restaurant-style depth, pour the mixture into a small saucepan and warm it over low heat for 3–5 minutes, stirring constantly. This helps the spices bloom and the pepper infuse fully into the sauce. Don’t let it boil — you only want it gently warmed.

Cool and chill: Remove from heat, let it cool to room temperature, then transfer it to a jar or airtight container. Refrigerate for at least 1 hour before serving. The resting time allows the flavors to deepen and the texture to become creamier.