Preheat the oven to 475°F. Line a standard a large baking sheet with parchment paper if making 12 mini pizzas or line a round baking pan with parchment paper for one round pie.
In a large bowl, whisk together the flour, salt and baking powder. Add the yogurt and mix together with a wooden spoon until all the ingredients are well combined.
Transfer the dough to a lightly floured surface and knead by hand for 6-8 minutes until the dough feels smooth, but some bumps are ok. Makes about a 1-pound dough ball.
For one pizza pie, use a rolling pin to flatten out the pizza dough into a round shape about 9 to 12 inches wide, depending on the preferred thickness. For 12 mini pizzas, divide the dough into 12 equal pieces and roll into balls, then use a rolling pin to flatten them out about 3 inches in width.
Poke the pizza crust with a fork a few times to avoid puffing in the oven. Bake in the preheated oven for 5 minutes. Add the toppings and return to the oven. Continue baking until the crust is lightly browned and the cheese has melted, 5 to 7 minutes more minutes.