Step 1

Preheat your oven to 350 degrees.

Step 2

Grease a 9×13 baking dish. Set aside.

Step 3

With a mixer, cream together the butter and sugar.

Step 4

Add the eggs, mixing in one at a time. Then add the vanilla and mix until smooth.

Step 5

In a separate large bowl mix together the flour, baking powder, baking soda, salt and cinnamon.

Step 6

In a separate small bowl mix together the milk and sour cream.

Step 7

Add 1/3 of the dry ingredients to the butter mixture, followed by 1/3 of the milk/sour cream mixture and repeat until it is all combined.

Step 8

To this batter add the mashed bananas and mini chocolate chips, then combine.

Step 9

Pour the batter into your 9×13 baking dish.

Step 10

Bake for 1 hour, or until a toothpick inserted into the centre of the cake comes out clean. (Check your cake after 30 minutes to see how it is baking.)

Step 11

Cool and enjoy!