Pre-heat oven to 400 degrees F.
Spray/coat baking sheet with oil so cauliflower will not stick or line baking sheet with parchment paper.
First, mix together flour and corn starch in medium bowl.Then add salt, pepper, onion powder, garlic powder,and cayenne (optional). Mix well.
Next, mix 1 cup of buttermilk with 5 large eggs in another medium bowl. Now season egg/ buttermilk mixture with same spices and quantities you used for flour mixture.
Dip each cauliflower piece in egg mixture, followed by the flour mixture and arrange on baking sheet.
Using your oil mister spray each cauliflower piece and place in oven. If not using a mister, coat lightly with oil.
Bake for 20 minutes total on the middle rack. After 10 minutes turn baking sheet and continue baking for 10 more minutes.
While cauliflower is baking prepare the wing sauce. Mix hot sauce with butter and microwave for about a minute. You only want the butter to melt. If not using a microwave heat in small saucepan until ingredients are melted.
Remove from oven and drizzle wing sauce over top of each piece. Serve immediately while still hot and crispy.
serve with ready-made ranch dressing for dipping.