Modified from Aunt Maureen
1 cup shortening (that's one stick)
1 1/2 cup brown sugar
1/2 cup white sugar
1 tsp vanilla
3 eggs, beaten
1 cup (8 oz) sour cream
3 1/2 cups flour
2 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1 bag (12 oz) chocolate chips
Cream shortening, sugar, eggs and vanilla. Alternately add flour and sour cream. Fold in chocolate chips.
Bake for 12-15 minutes at 350.