Cream the softened butter with the sugar.

Beat in the egg and vanilla extract.

Sift the all-purpose flour and baking powder, and combine it with the butter mixture.

Chill the dough for at least 30 minutes. Roll into one inch balls and flatten on a greased baking sheet.

Make a dent in the center and fill it with 1 teaspoon of raspberry jam.

Bake in a preheated oven at 175 degrees Celsius for 12-14 minutes.