Preheat the oven to 425°F (220°C). Line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the all-purpose flour, garlic powder, paprika, sea salt, and black pepper.
Add the water and whisk until a smooth batter forms.
Add the cauliflower florets to the bowl and toss until evenly coated.
Spread the coated cauliflower on the prepared baking sheet in a single layer.
Bake for 20 minutes, flipping halfway through if needed.
Transfer the baked cauliflower back to a bowl. Add the buffalo-style wing sauce and toss until coated.
Return the sauced cauliflower to the baking sheet and bake for another 12–15 minutes, until the sauce is set and the edges are lightly crisp.
To make the cashew ranch, add the soaked and drained cashews, water, dried dill, garlic powder, onion powder, sea salt, and black pepper to a blender.
Blend until smooth and creamy.
Serve the buffalo cauliflower wings warm with cashew ranch dressing and chopped celery.