Batter the cauliflower: Preheat oven to 450 degrees. Whisk flour, milk, salt, pepper, and garlic powder. Dip cauliflower pieces in the batter and let excess drip off. Place on parchment-lined baking sheet. Bake on an upper rack for 15-20 minutes until lightly crisped and browned.
Spice the cauliflower: Gently toss the baked cauliflower in a bowl with the hot sauce. Return to pan. Bake for another 5-10 minutes.
Avocado Crema: Mix all ingredients in a food processor or blender until smooth.
Slaw: Toss the slaw with some of the avocado crema until it’s nice and creamy.
Tacos: Fill each tortilla with slaw, cauliflower, a drizzle of avocado crema, and cilantro. Perfection!