Line a jumbo muffin tin with jumbo cupcake liners or use regular muffin tin but see note baking times.
In a medium bowl, whisk the cocoa, flour, baking soda, baking powder, cream of tartar and salt together.
1/4 Cup Cocoa, 1 3/4 Cup Flour, 1/2 teaspoon Baking Soda, 2 teaspoons Baking Powder, 1/2 teaspoon Cream of Tartar, 1/4 teaspoon Salt
Set aside.
In a large mixing bowl, beat the shortening, sugar, eggs and vanilla until smooth.
1/3 Cup Shortening, 2 Large Eggs, 2/3 Cup Sugar, 1/2 teaspoon Vanilla
Slowly add a little of the flour, mix, a little of the banana, mix, and continue to alternate ending with the banana.
1 Cup Bananas
Add the chocolate chips, fold in to combine and spoon 2/3 full in the muffin tin.
1 1/2 Cup Semi Sweet Chocolate Chips
Bake for 25-30 minutes and allow to cool.
Notes
You can use butter or shortening, but the shortening seems to make a softer muffin. If making regular sized muffins decrease the time to 15-20 minutes or until a toothpick comes out clean.muffins can be frozen for up to 3 months