Preheat oven to 350 degrees F (180 degrees C).
Line 5 (8" x 3 3/4" x 2 1/2") loaf pans with parchment paper. Spray with cooking spray. Set aside.
Mash the Banana (6).
Place Red Velvet Cake Mix (2 package), Egg (6), Vegetable Oil (2/3 cup), and mashed bananas in a large bowl. With an electric mixer, beat on low for 20 seconds, then turn up speed to medium and mix for 2 minutes.
Stir in Semi-Sweet Chocolate Chips (12 ounce) and Walnut (1 cup).
Pour batter into loaf pans.
Bake for 40 minutes or until a toothpick inserted in the middle comes out clean. Let cool.
Place White Candy Melts (8 ounce) in a microwave safe bowl. Microwave on high for 1-2 minutes or until completely melted. Stir until smooth.
Pour into a clear plastic pastry bag. Cut the tip off and drizzle melted candy over the cooled bread.
Add Sprinkles (to taste) and let the candy melts set, about 20-30 minutes.
For a gift, wrap in clear plastic wrap. Tie a bow around it and add gift tag. Store at room temperature for 24 hours or in the refrigerator for up to 5 days.