Preheat oven to 350 degrees and line cookie sheets with parchment or silicone mats or use non-stick cooking trays.
Cream together butter and sugar until light.
Mix in eggs and vanilla
Mix flour, baking soda, baking powder, and salt together. then slowly add to the butter mixture.
Slowly mix in oats 1 cup at a time.
Mix in chocolate chips into the cookie batter.
Scoop cookies out onto lined trays.
Bake for 8-11 minutes or freeze for later.