Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine the all-purpose flour, baking powder, and salt.

Cut in the cold cubed unsalted butter until the mixture resembles coarse crumbs.

Gradually pour in the milk, mixing gently until a soft, slightly tacky dough forms.

Transfer the dough to a lightly floured surface and roll it out to about ¼-inch thickness.

Cut out circles from the rolled dough using a round cutter or a glass.

On each dough circle, place a tablespoon of pizza sauce, mozzarella, and pepperoni.

Fold the dough over the filling to form a half-moon shape and seal the edges.

Brush the tops with beaten egg and sprinkle with dried oregano.

Bake for 15-18 minutes until puffed up and golden brown.

Cool for a few minutes before serving.