Prepare the crust by combining the dry yeast, sugar, dry milk powder with warm water and let sit for 2-3 minutes. Add the oil, salt, and flour and stir to combine. Once a dough forms, turn it onto a floured counter and knead until elastic, about 10 minutes. Divide the dough into 2 and let sit 10 minutes.
Roll into a 9-inch circle and place into pans sprayed with cooking oil. Cover with plastic wrap and let rise until doubled, about 1 hour.
Preheat the oven to 475 F and spoon marinara sauce on the dough, leaving a 1-inch crust. Sprinkle with mozzarella cheese, pepperoni, and any other choice of toppings. Brush melted butter on the crust.
Cook until the crust is browned, about 11-15 minutes. Remove from the oven and let cool for 4 minutes before cutting and serving.