Preheat oven to 350°.
For cookie dough:Beat butter and brown sugar. Add egg and vanilla. Add flour and baking powder. Mix well. Shape into balls. Place 2" apart on ungreased cookie sheets. Make indentation in each cookie. Press lightly, if the hole is too deep, the filling will cook through and fall out the bottom.
Prepare filling by combining all filling ingredients in a bowl. Fill each cookie with 1 teaspoon of filling.
Bake 8-12 minutes or until lightly browned. Cool 1 minute on cookie sheets; remove to cooling rack.
This make a large batch. They freeze very well.
