Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper or lightly grease it.
Unroll the crescent dough and separate it into 4 rectangles, pressing the seams together tightly. Repeat with the second can of dough so you have 8 rectangles total.
On 4 of the rectangles, spread about 2 to 3 tablespoons of pizza sauce each.
Add a handful of pepperoni and 2 thick slices of mozzarella on top of each sauced rectangle.
Place the remaining 4 rectangles over the top to form pockets. Press the edges together to seal, then crimp with a fork if desired for a tighter seal and decorative edge.
Use a fork to poke a few holes in the top of each pocket to let steam escape while baking.
Arrange on the prepared baking sheet, leaving space between each pocket.
Bake for 12 to 15 minutes, or until golden brown and cooked through.
Let them cool for a few minutes before serving. The filling will be hot.