Pecan Pie Cookies

1 cup packed brown sugar 

3/4 cup salted butter, softened

1 egg

1 tsp. vanilla

2 cups all-purpose flour

1 tsp. baking powder

Filling

1 cup chopped pecans

1/2 cup packed brown sugar

1/4 cup milk

1 tsp. vanilla

Preheat oven to 350°F. For cookies, beat butter and sugar on medium speed of an electric mixer until creamy. Add egg and vanilla and mix. Reduce speed to low and add flour and baking powder. Beat until well mixed. Shape dough into 1 1/4-inch balls. Place 2 inches apart on ungreased baking sheets. Make an indentation in each cookie with your thumb; rotate thumb to hollow out slightly. Combine all the filling ingredients (pecans through vanilla) in a small bowl. Fill each cookie with 1 rounded teaspoon of filling. Bake for 8-12 minutes or until lightly browned. Cool for 1 minute on baking sheet then remove to cool completely on a wire rack or sheet of aluminum foil.