1 cup all- purpose flour
1/2 cup whole wheat flour
1 tsp coarse salt
1/2 tsp baking soda
3/4 cup (1 1/2 sticks) unsalted butter, room temperature
1/2 cup granulated sugar
1/2 cup packed light brown sugar
1 large egg
1 1/2 tsp pure vanilla extract
1/2 cup mashed ripe banana (about 1 large)
1 cup old-fashioned rolled oats
8 ounces semisweet chocolate, coarsely chopped into 1/2 inch chunks (~224 gr)*
1/2 cup coarsely chopped wanuts (about 2 ounces), toasted
1. Preheat oven to 375 F. Whisk together both flours, salt and baking soda in a bowl.
2. Put butter and both 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 just combined. Stir in oats, chocolate chunks, and walnut.
3. 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, 12-13 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 at room temperature up to 2 days.
Makes about 3 dozen.