Step 1

Pre-heat oven to 375° (190° celsius). Lightly grease an 8 inch cake pan

Step 2

In a medium bowl mix together chocolate chips, brown sugar, flour and cinnamon cut in the butter until it resembles coarse crumbs. Set aside.

Step 3

In a medium bowl whisk together flour, baking powder, baking soda and salt. Set aside.

Step 4

In a mixing bowl cream until light (3-5 minutes) the butter, sugar and vanilla, then add the egg and mashed banana, combine.

Step 5

Add the whisked ingredients alternately with the Greek yogurt, starting and ending with sifted ingredients, beat until smooth.

Step 6

Pour into the prepared cake pan, sprinkle with the crumb topping and bake for approximately 45-60 minutes (check for doneness with a toothpick). Let cool before serving. Enjoy!