Preheat the oven to 350°F.
In a large bowl, stir together the banana, peanut butter and eggs.
1/4 cup mashed banana, 1/2 cup creamy peanut butter, 2 eggs
Oncecombined, add the maple syrup, vanilla and milk.
1/4 cup maple syrup, 1 teaspoon vanilla, 1 1/2 cups milk
Next, stir in the baking powder, oats, and 1/4 c mini chocolate chips. If you'd like to add flax seed, add it now.
1 teaspoon baking powder, 2 1/2 cups old-fashioned oats, 1/4 cup + 2 tablespoons mini chocolate chips, 1/4 cup ground flax seed
Pour into a greased 8x8 or 9x9 inch pan and sprinkle the remaining 2 Tbsp mini chocolate chips on top.
Bake for 20-25 minutes or until the center is just set. (A little wiggle is still fine)
If desired, melt a couple tablespoons of peanut butter in the microwave and drizzle on top.
additional peanut butter for topping
Enjoy warm, or cool, cut into bars and enjoy throughout the week!
Store refrigerated for up to 5 days.