Preheat the oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper.
Combine flour, almond milk, water, garlic powder, paprika, salt, and black pepper in a large bowl. Pour panko into a shallow bowl. Dip florets into the batter to coat completely. Roll in panko and lay on the prepared baking sheet, leaving a bit of room between each one.
Bake in the preheated oven for 25 minutes.
Pour barbeque sauce into a bowl. Remove cauliflower from oven; dip each floret in the barbeque sauce and place back onto the baking sheet. Drizzle with sriracha sauce. Bake for 25 minutes more.
