Preheat oven to 350°F (176°C) lightly grease a 12-count muffin tin or use a liner of your choice. (mine made a baker's dozen)
Whisk (or sift if you have a sifter) dry ingredients: the 2 flours, wheat germ, cinnamon, salt, baking powder, and baking soda together in a bowl and put it aside
Utilize a different bowl for wet ingredients, use a fork to squash the bananas until smooth.
Melt the lard or butter in a mixing bowl or use a pan on the stove let it cool a bit.
Add remaining Wet ingredients to mashed banana: the egg whites, cooled lard, sourdough discard, and vanilla extract and mix until combined.
Add the wet ingredients to the dry ingredients and mix until just combined. (Do not over mix!) It will be thick.
Bake for 20-25 minutes (check at 15min) or until a toothpick inserted into the center comes out clean. Transfer to cooling rack. When cool they pop right out of the tin if it is greased :)