This recipe is from an IC safe cookbook.
1/4 cup shortening or butter
1 cup light brown sugar (packed)
3/4 cup sifted flour
1 tsp baking powder
1/2 tsp salt
1/2 tsp vanilla
3/4 cup butterscotch chips
Heat oven to 350F. Melt butter over low heat. Remove from heat and blend in brown sugar. Cool. Stir in egg. Sift together and stir in flour, baking powder and salt. Stir in vanilla and chips. Spread in well-greased and floured square pan, 8"x 8" x 2". Bake 20-25 minutes until a light touch with finger leaves slight print. Cut into bars while warm. this is an old recipe and very good!