Combine sourdough discard, all-purpose flour, salt, and baking powder to make the dough
Knead the dough until smooth and elastic, then let it rest for 30 minutes
Preheat oven to 450°F (230°C)
Roll out the dough into a circle or rectangle
Spread pizza sauce, cheese, and toppings over the dough
Bake for 12-15 minutes until golden brown and bubbly
Let it cool, then slice and serve hot
