Preheat oven to 400 degrees. Prepare a large baking sheet with parchment paper.
Roll out pizza dough on parchment paper.
Using a sharp knife, cut corners creating a heart shape. If desired, use the dough you cut away to create smaller hearts with cookie cutters.
Place in oven and bake for about 5 minutes.
Remove pizza dough from oven and add sauce, mozzarella cheese and pepperoni.
Return to oven and bake an additional 8 to 10 minutes, depending on the thickness of your dough and desired done-ness.