buffalo cauliflower recipe

olive oil cooking spray 1 cup water ¾ cup gluten-free baking flour (such as Premium Gold® Flax and Ancient Grains All-Purpose Flour) ½ teaspoon garlic powder, or to taste salt and ground black pepper to taste 2 heads cauliflower, cut into bite-size pieces 2 tablespoons butter ½ cup hot pepper sauce (such as Frank's RedHot®) 1 teaspoon honey