Preheat your oven to 450°F (230°C) and line a baking sheet with parchment paper.
In a large bowl, whisk together the flour, water, garlic powder, onion powder, smoked paprika, salt, and black pepper until smooth.
Dip each cauliflower floret into the batter, allowing any excess to drip off, and place them on the prepared baking sheet in a single layer.
Bake the cauliflower for 20-25 minutes, or until golden brown and crispy.
While the cauliflower is baking, combine the buffalo sauce and olive oil in a small bowl.
Once the cauliflower is done, remove it from the oven and toss it in the buffalo sauce mixture until well coated.
Return the coated cauliflower to the baking sheet and bake for an additional 10-15 minutes, until the sauce is slightly caramelized.
Remove from the oven and let cool for a few minutes. Garnish with chopped parsley before serving.