Preheat the oven to 425 degrees. Cover a sheet pan with parchment paper and grease Cut the cauliflower into bite size florets. In a small bowl mix the milk, flour, and garlic together to make a batter. Dip the florets into the batter and shake off the excess batter. Place them on a sheet pan in a single layer. Bake for 20 minutes. Melt the butter and mix in the hot sauce in a medium bowl. Toss the cauliflower with the sauce and enjoy.