Preparing these cookies is as fun as it is easy. The recipe calls for three ripened, mashed bananas, half a cup of peanut butter, and two cups of oats — which should yield about 18 cookies.

These easy oatmeal cookies are the ideal cookie texture in my book: soft, thick, perfectly chewy. Make them as is for the most classic oatmeal cookie, or use them as a jumping off point to add in ...