Again, with the Oatmeal Cookie!
Preheat oven to 350 degrees.
Cream together the butter, sugars and zest. This gives the oils from the zest a chance to blend into the butter. Beat in the egg, oil, vanilla extract, baking soda, and flour until just mixed. Add in the rest of the ingredients and combine.
Drop walnut-sized balls of dough on cookie sheets. Bake for approximately 10 to 12 minutes, depending on size you make the cookies.
Although using vegetable spray to grease the sheets is fine, consider using parchment paper. It helped bake the cookies more evenly and clean up is very easy. The cookies just slide off.