1: Preheat the oven to 350°F and grease a loaf pan.
2: In a bowl, combine ground oats, old-fashioned oats, baking powder, and baking soda.
3: In another bowl, mash the ripe bananas and mix in malted butter, honey, and Greek yogurt.
4: Add the dry ingredients to the wet ingredients and mix until just combined.
5: Fold in the walnuts and pour the batter into the prepared loaf pan.
6: Bake for 50 minutes or until a toothpick comes out clean.
7: Let it cool before slicing.
