Step 1

Preheat oven to 450 degrees F (230 degrees C). Spray a baking sheet with cooking spray.

Step 2

Whisk wing sauce, mayonnaise, and egg together in a large bowl. Toss cauliflower florets in the sauce mixture to coat completely. Spread cauliflower out on baking sheet.

Step 3

Pulse croutons into fine crumbs in a food processor. Add Parmesan cheese and mix to combine. Sprinkle crouton and cheese mixture over cauliflower.

Step 4

Bake in the preheated oven until cauliflower is golden brown and tender, about 15 minutes. Let sit before removing from baking sheet, about 5 minutes.

Step 5

Mix blue cheese dressing with sour cream and black pepper to make dip. Serve dip alongside cauliflower.