In a large bowl, combine the warm water, yeast, and sugar. Let the mixture sit for 5–10 minutes, until it becomes foamy.
Stir in the olive oil, then gradually add the flour, garlic powder, and salt. Mix until a soft dough forms.
Transfer the dough to a lightly oiled bowl, turning it once to coat. Cover with plastic wrap or a clean kitchen towel and let it rise in a warm place for 45–60 minutes, or until doubled in size.
Preheat the oven to 400°F. Lightly grease a 9-inch springform pan with cooking spray.
Press the dough evenly into the bottom of the pan and up the sides to create the crust.
Spread the pizza sauce over the dough, then top with the mozzarella, pepperoni, mushrooms, and olives (or your toppings of choice).
Bake for 30-40 minutes, or until the crust is golden brown and the cheese is melted and bubbly. Let cool for a few minutes before slicing and serving.