Prepare Dough: In a large bowl, whisk together the gluten-free flour, rice flour, tapioca starch, baking powder, salt, and xanthan gum.
Add Liquids: Pour in warm water, olive oil, and apple cider vinegar. Mix until a sticky dough forms.
Rest the Dough: Cover with a clean towel and let it rest for 30 minutes to improve elasticity.
Preheat Oven: Set your oven to 230°C (450°F) and line a baking sheet or pizza stone with parchment paper.
Shape the Base: Lightly flour a surface and roll out the dough to about 1/4-inch thickness. Transfer to the prepared baking sheet.
Pre-Bake: Bake the crust for 8-10 minutes until slightly golden.
Add Toppings: Spread tomato sauce over the base, sprinkle with mozzarella cheese, and add your favourite toppings.
Final Bake: Return to the oven and bake for 10-12 minutes, or until the cheese is melted and bubbly.
Serve and Enjoy: Let cool for a few minutes before slicing. Garnish with oregano for extra flavour.