Cut the cold butter into small pieces. Knead the cold butter into the mixture until you get a smooth dough.

Form a big ball of dough and wrap in saran wrap before you place it for 30 minutes in the fridge.

Roll the dough out till about 0.5cm thick.

Place a 5x5cm square template or square shaped cookie cutter over the dough and cut squares out of the mass.

Place them on a baking sheet with baking paper. Find a bottle cap to place in the middle of the cookie.

Fold the left and the right edge together in the middle over the bottle cap. (not plastic!! - glass, metal or aluminium)

Fold the bottom edge up over the middle.

If you have a little heart cookie cutter, cut a small heart out in the top edge.

Bake at 180 degrees for 10 minutes and immediate remove the cap.

Once cold fill with red berry jam and sprinkle with more powdered sugar.