2 heads cauliflower, cut into pieces and sliced in half
3/4 cup gluten-free baking flour
1 cup water
1/2 teaspoon garlic powder, or to taste
salt and ground black pepper to taste
Preheat oven to 450 degrees F (230 degrees C). Lightly grease a baking sheet with cooking spray.
Mix flour, water, garlic powder, salt, and pepper together in a bowl using a whisk until batter is smooth and somewhat runny. Add cauliflower to batter and mix until cauliflower is coated; spread onto the baking sheet flat side down.
Bake in the preheated oven until lightly browned, 20 to 25 minutes.
Turn on broiler and bake for 5 minutes for crispiness.