1/2 cup butter, melted
3/4 cup brown sugar
1 egg
1 T milk
1 tsp vanilla
1/2 tsp baking powder
1/8 tsp salt
1-3/4 cups flour

Preheat oven to 350 degrees. Stir the brown sugar into the melted butter until sugar is mostly dissolved; set aside to cool for a few minutes. Beat in egg, milk, and vanilla. Stir in flour, baking powder, and salt. Drop by spoonfuls onto lightly greased cookie sheets about 2" apart. Bake 10 minutes or until edges are just browned. Let cool on cookie sheet 1 minute then transfer cookies to wire racks to cool completely.