-1 cup all-purpose flour
-1/2 cup whole-wheat flour
-1 tsp salt
-1/2 tsp baking soda
-3/4 cup (1 1/2 stick unsalted butter, softened
-1/2 cup granulated sguar
-1/2 cup packed light brown sugar (I used dark)
-1 large egg
-1 1/2 tsp vanilla extract
-1/2 cup mashed ripe banana (I used two for more banana flavor)
-1 cup old fashioned rolled oats
-8 ounces semisweet chocolate chips (you can also used coarsely chopped chunks)
-1/2 cup coarsely chopped walnuts, toasted
Preheat oven to 375 F. Whisk together flours, salt, and baking soda in a small bowl; set aside.
Put butter and sugar into the bowl, mix with hand mixer or in a stand mixer on medium until pale and fluffy. Reduce speed to low. Add egg and vanilla; mix until combined. Mix in banana. Add flour mixture; mix until just combined. Add in banana. Add flour mixture; mix until just combined. Stir in oats, chocolate chips, and walnuts.
Use a teaspoon and scoop rounded teaspoons onto your cookie sheet with about 1 1/2 to 2 inches between the cookies. Bake the cookies, rotating the sheet halfway through, until golden brown and just set (about 12-13 minutes). Let cool on the cookie sheet for 5 minutes; let cool completely on wire racks.
Adapted from Martha Stewart's recipe