Preheat oven to 375°F.
Cream together butter and sugars.
Add eggs and vanilla. Using a blender or food processor, grind the oatmeal until it turns to powder.
In a separate bowl, mix the oatmeal, flour, baking powder and baking soda.
Add peanut butter chips, chocolate chips, white chocolate and chopped walnuts.
Drop by tablespoons, 2 inches apart, onto an ungreased baking sheet.
Bake approximately 7 minutes.
Provided by King Arthur Flour
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