In a standing mixer or with a hand mixer, cream sugars and shortening together.
Add eggs and vanilla and mix to combine.
Sift flour, baking soda, salt and baking powder together and add, mixing well. Stir in, or use light setting on mixer, oats and chocolate chips (yes, use the whole bag!).
Drop cookie dough in 1-2 inch balls on cookie sheet and bake for 10 minutes (unless you like them a little crispier, then do 12 minutes).