Mix the flour with baking soda and cocoa. Mix the butter with sugar and peanut butter until creamy, then add the vanilla and the egg. Stir in the flour mixture.
For the filling, mix the powdered sugar with the peanut butter until creamy. Shape into 2 cm balls.
Cut off 1 tablespoon of chocolate dough each and enclose a ball with it. Flatten the dough pieces a little and place them on a baking sheet lined with baking paper. Bake in the oven preheated to 180 ° for 7-9 minutes. They should be firm and easily torn.