In a large bowl, combine flour, instant yeast, sugar, and salt. Mix well.
Add warm water and olive oil. Stir until a shaggy dough forms, then knead until smooth and elastic.
Lightly oil a bowl, place the dough inside, cover, and let rise until doubled and puffy.
Turn dough onto a lightly floured surface, shape into a log, and divide into 3 pieces. Roll into balls.
Cover dough balls with a towel and let rest until relaxed.
Preheat oven to 450°F (232°C). Place a dough ball on a parchment-lined baking sheet and stretch into a round. Add sauce, mozzarella, and pepperoni (plus toppings of choice).
Bake until crust is golden and cheese is melted and bubbling.
Rest 2–3 minutes, slice, and serve.