Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Mix the Dry Ingredients
In a large bowl, combine the tapioca flour, garlic powder, salt, and baking powder.
Add the Cheeses
Stir in the shredded mozzarella and grated Parmesan cheese until well mixed.
Combine the Wet Ingredients
In a separate bowl, whisk together the eggs and milk until smooth.
Combine Mixtures
Pour the wet mixture into the dry ingredients, mixing until a dough forms.
Knead the Dough
Knead the dough for a minute or two until it becomes smooth and elastic.
Shape the Crusts
Divide the dough into two equal portions and shape each portion into a round crust on the prepared baking sheet, about 1/4 inch thick.
Bake the Crusts
Bake in the preheated oven for 15-20 minutes or until the edges are golden and the crust is set.
Add Toppings
Remove the crusts from the oven, add your desired toppings, and return to the oven for an additional 5-10 minutes, until the cheese is melted and bubbly.
Serve
Allow to cool slightly before slicing and serving.