Add the mustard, mayonnaise, and dry spices to your ground chicken. Mix well to ensure everything is evenly distributed.
1 tablespoon yellow mustard, 2 tablespoons mayonnaise + more for your buns, ½ teaspoon paprika, ¼ teaspoon onion powder, ½ teaspoon garlic powder, pinch cayenne, 1½ teaspoon kosher salt, ¼ teaspoon black pepper, 1 pound ground chicken