Cream butter, add sugar and cream well. Add egg and extract. Add the flour to make a stiff dough. Pinch off a small ball of dough. Place it in the center of the sand bakkel tin and with the thumb press dough evenly on inside of tin, spreading it as thin as possible on the bottom of and side of tin. Place filled tins on cookie sheet. Bake in moderate (375) oven for 15 minutes or until golden brown. Cool before removing from tins. To remove from tin, invert the tin and tap gently. Clean tins with a dry cloth only.