Combine two mashed ripe bananas with 1.5 cups of oats, a splash of milk, and a tablespoon of melted oil to make the base mixture.
Fold in a handful of dried cranberries or raisins for extra flavor texture.
Press the dough firmly into a parchment-lined pan and bake at 350°F for 35 to 40 minutes.
Let the tray cool completely before cutting it into portable bars.