The recipe was taken from www.marthastewart.com.
Banana Walnut Chocolate Chunk Cookies
1 cup all purpose flour
1/2 cup whole what flour
1 teaspoon coarse salt
1/2 teaspoon baking soda
3/4 cup unsalted butter, softened
1/2 cup granulated sugar
1/2 cup packed light brown sugar
1 large egg
1 1/2 teaspoons pure vanilla extract
1/2 cup mashed ripe banana (about 1 large)
1 cup old fashioned rolled oats
8 ounces semisweet chocolate chunks
1/2 cup coarsely chopped walnuts
Directions
Preheat oven to 375 degrees. Whisk together flours, salt, and baking soda in a small bowl; set aside. Put butter and sugars into the bowl of an electric mixer fitted with the paddle attachment; mix on medium speed 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. Stir in oats, chocolate chunks and walnuts.
Using a 1 1/2 inch ice cream scoop, drop dough onto baking sheets lined with parchment paper, spacing about 2 inches apart. Bake cookies, rotating sheets halfway through, until golden brown and just set, 12 to 13 minutes. Let cool on sheets on wire racks 5 minutes. Transfer cookies to wire racks; let cool completely. Cookies can be stored in airtight containers up to 2 days.