01 -
If using a pizza stone and not a baking sheet, place the pizza stone in the oven and preheat to 350℉.
02 -
Place the pizza crust on a large plate, cutting board, or pizza peel if available, then evenly spread the apple pie filling on top, leaving the elevated crust bare.
03 -
Combine flour, brown sugar, cinnamon, and oats in a bowl. Cut in the cold butter with a pastry cutter or butter knife until the mixture forms clumps.
04 -
Carefully slide the prepared pizza onto the preheated pizza stone or baking sheet, and bake at 350℉ for 20-25 minutes, or until the topping starts to darken and is no longer dry.
05 -
While the pizza is baking, mix the powdered sugar, milk, and vanilla extract in a small bowl to make the icing.
06 -
Once the pizza is baked, let it cool slightly, then drizzle the prepared icing over it before slicing and serving.