Banana Bars made with mashed bananas, yogurt, healthier white whole wheat flour, and loaded with milk chocolate chips. Banana snack bars are a great snack and the most delicious way to use up brown bananas.
Preheat oven to 350°. Spray a 9x9-inch baking dish with cooking spray OR line with parchment paper.
In a mixing bowl, or bowl of a stand mixer, add the butter, sugar, brown sugar, Greek yogurt, baking powder and salt. Beat until combined well.
Add the egg, mashed banana, and vanilla extract. Beat until combined.
Add in the flour and beat on low speed just until combined and no flour spots remain. Add the chocolate chips (reserve some for the top of bars) and stir to combine.
Evenly spread the banana bar batter into the prepared baking dish. Sprinkle the reserved chocolate chips on top.
Cook for 25-35 minutes. A toothpick inserted into the middle should come out clean. The bars will be puffy and the edges will have pulled away slightly from the pan.
Let the bars cool in the pan for 1 hour before cutting.