Step 1

Preheat oven to 425 degrees F (220 degrees C). Line a muffin tin with parchment paper squares.

Step 2

Grate cauliflower into a microwave-safe bowl using a fine grater. Chop up any remaining pieces that are too small to grate but too big for the crust.

Step 3

Microwave cauliflower until soft and tender, 4 to 6 minutes. Pour cauliflower into a clean dish towel cool easily handled, 15 to 20 minutes.

Step 4

Wrap the towel around the cauliflower and squeeze out as much liquid as possible; the drier the cauliflower is, the better it will hold together as a crust once mixed with the other ingredients.

Step 5

Combine cauliflower, 1 cup mozzarella cheese, Parmesan cheese, egg, salt, pepper, garlic powder, and onion powder in a large bowl.

Step 6

Scoop cauliflower crust mixture into prepared muffin tin, dividing the mixture evenly among the cups. Pat down cauliflower mixture with the back of a spoon, making it compact.

Step 7

Bake in the preheated oven until golden brown, about 15 minutes.

Step 8

Spoon a small amount of pizza sauce onto each cauliflower crust. Top with remaining 1 1/2 cups mozzarella cheese, dividing evenly among the crusts.

Step 9

Bake until golden brown and cheese is melted, about 15 minutes. Let sit in pan for 5 minutes before moving each bite to a cooling rack. Let cool for 10 minutes. Peel parchment paper squares off the crusts and serve on a platter.