Whataburger Creamy Pepper Sauce

1 cup mayonnaise
1 tablespoon dry mustard powder
1 1/3 tablespoons white vinegar
1 tablespoon lemon juice
2 tablespoons chipotle peppers in adobo sauce
1 1/2 tablespoons freshly cracked black pepper
1/2 teaspoon ground white pepper
1 teaspoon salt
1 tablespoon onion powder
1 tablespoon garlic powder
1 teaspoon dry parsley
1/4 teaspoon Accent (MSG) Optional

Combine all in a small bowl. Mash the chipotle peppers as you stir them. Stir until you have a uniform mixture.
Place in an air tight container, and wait 1 hour before serving for best flavor.