Ingredients
- 1⁄2 cup (1 stick) unsalted butter, room temperature
- 1⁄2 cup brown sugar, packed
- 1⁄2 cup sugar
- 1 large egg, room temperature
- 1⁄2 tsp vanilla extract
- 1 cup rolled oats
- 1⁄2 cup whole-wheat pastry flour
- 1⁄2 cup whole-wheat bread flour
- 1⁄2 tsp baking powder
- 1⁄2 tsp baking soda
- 1⁄2 tsp salt
- 1⁄2 cup unsweetened cocoa powder
- 6 oz (60-percent cacao) chocolate chips
- 3⁄4 cup chopped walnuts or pecans, toasted lightly for extra flavor