- 1 head cauliflower, trimmed
- 4 cups milk
- 2 tablespoons all-purpose flour
- 1 tablespoon butter, or to taste
- salt and ground black pepper to taste
- 1 pinch garlic powder, or to taste (optional)
- 2 cups shredded Cheddar cheese, divided
- Bring a pot of water to a boil; cook cauliflower until slightly tender, 10 to 15 minutes. Remove cauliflower from water and place in a colander to drain for 1 hour.
- Preheat oven to 350 degrees F (175 degrees C). Place cauliflower in a baking dish.
- Mix milk, flour, butter, salt, pepper, and garlic powder together in a saucepan; bring to a boil. Gradually sprinkle 1 1/2 cups Cheddar cheese into milk mixture, stirring constantly, until mixture turns into a thick sauce, about 5 minutes. Pour sauce over cauliflower and top with remaining Cheddar cheese.
- Bake in the preheated oven until cauliflower is tender, about 1 hour. Let stand for 10 minutes.