In a bowl, beat together the softened butter, brown sugar, and white sugar. Add in eggs and vanilla and mix well. Stir in the flour, baking powder, baking soda and salt until completely incorporated. Fold in the oats and white chocolate chips.
Drop by tablespoonfuls onto cookie sheets and bake for 9-12 minutes (do not overcook). Remove from cookie sheets and let cool.
Notes
For best results, we highly recommend using instant oats for this recipe.