01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper or silicone baking mat.
02 - Whisk together flour, water, garlic powder, onion powder, smoked paprika, salt, and black pepper in a large bowl until smooth batter forms.
03 - Add cauliflower florets to batter, tossing to coat evenly.
04 - Arrange battered cauliflower in single layer on prepared baking sheet, shaking off excess batter.
05 - Bake for 20 minutes, flipping halfway through, until beginning to brown.
06 - Whisk together hot sauce, melted butter, and honey or maple syrup if using in small bowl.
07 - Remove cauliflower from oven and gently toss with buffalo sauce to coat.
08 - Return cauliflower to baking sheet and bake for additional 15 minutes, until crispy and deeply golden.
09 - Transfer to serving platter. Garnish with chopped parsley and serve immediately with celery, carrots, and dressing.