1. Preheat oven to 375 degrees.
2. In large bowl, mix shortening, sugars, and eggs together until creamy. Set aside.
3. In another large bowl, mix together flour, baking powder, salt, and oats.
4. Add to sugar mixture.
5. Add milk and vanilla.
6. Stir in chocolate chips.
7. Drop onto greased cookie sheets.
8. Bake for 10 minutes.