01 -
Preheat oven to 350°F and grease a 9×5-inch loaf pan.
02 -
Cream together ½ cup unsalted butter and 1¼ cups packed brown sugar until light. Add 1 teaspoon vanilla extract and 1/3 cup mashed banana. Mix until smooth.
03 -
In a separate bowl, whisk together 1¾ cups flour, 1 teaspoon baking soda, and ½ teaspoon kosher salt.
04 -
Beat together ½ cup softened butter and ¾ cup brown sugar. Stir in heat-treated flour and mini chocolate chips to form a soft dough. Roll into small balls.
05 -
Fold the dry ingredients into the wet mixture until just combined. Gently fold in cookie dough balls, distributing evenly through the batter.
06 -
Transfer batter into the prepared pan. Bake at 350°F for 55–65 minutes, or until a toothpick inserted comes out with a few moist crumbs.
07 -
Let the loaf cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.