Step 1

Preheat oven to 325°. Line a muffin tin with 12 liners.

Step 2

In a large mixing bowl cream butter and sugar with an electric mixer.

Step 3

Add egg whites, bananas, apple sauce, vanilla, and beat at medium speed until thick. Scrape down sides of the bowl.

Step 4

In a medium bowl, combine flour, cocoa powder, baking soda and salt with a wire whisk.

Step 5

Add flour mixture to bananas, then blend at low speed until combined; do not over mix.

Step 6

Fold in chocolate chips and pour batter into muffin tins.

Step 7

Bake on the center rack for 30 minutes, or until a toothpick inserted in the center comes out clean.

Step 8

If making the glaze, combine confectioner's sugar and 1/4 to 1/2 tsp water to make a glaze. Drizzle over each muffin.