Chocolate Chip Banana Crumb Cake
 
Ingredients
Cake:
  • 1½ cups all-purpose flour
  • ½ teaspoon ground cinnamon
  • ¾ teaspoon baking soda
  • ¾ teaspoon baking powder
  • 5 Tablespoons salted butter, softened
  • ½ cup granulated sugar
  • 1 egg
  • 1 teaspoon vanilla
  • 1½ cups mashed ripe banana, about 3 ripe bananas
  • ¼ cup yogurt, (I used vanilla greek yogurt)
Cinnamon Filling:
  • 2 Tablespoons light brown sugar
  • 1½ teaspoons cinnamon
  • ⅔ cup semi-sweet chocolate chips
Streusel Topping:
  • ¾ cup all-purpose flour
  • ¼ cup granulated sugar
  • ¼ cup light brown sugar
  • 2 teaspoons ground cinnamon
  • 6 Tablespoons salted butter, melted and cooled for a minute
Instructions
  1. Preheat oven to 350°F. Grease a 9x9 square baking pan.
  2. Stir together flour, cinnamon, baking soda, and baking powder. Set aside.
  3. With an electric mixer, beat the butter until smooth.
  4. Add in the granulated sugar and beat until combined. Scrape down the side of the bowl as needed.
  5. Add in egg and vanilla and beat until smooth.
  6. Add in mashed banana and yogurt and mix until combined.
  7. Add in the dry ingredients and mix until just combined. Don't mix too much or the batter will become tough.
  8. Pour half of the batter into the prepared and pan and spread it into an even layer.
  9. Mix together the 2 T. of brown sugar and 1½ t. cinnamon for the Cinnamon Filling.
  10. Sprinkle the Cinnamon Filling over the batter in the pan.
  11. Sprinkle ⅓ cup of the chocolate chips over the Cinnamon Filling.
  12. Pour the remaining batter into the pan and spread it into an even layer.
  13. Sprinkle the remaining ⅓ cup of chocolate chips on top of the batter.
  14. Make the streusel topping next by combining the dry ingredients with a whisk and then gradually stirring in the melted butter until you have moist crumbs. You may not use all of the melted butter. If the mixture becomes too wet, add a Tablespoon of flour one at a time until it drys out a little.
  15. Crumble the streusel mixture on top of the chocolate chips in the pan.
  16. Bake for 25 minutes and then cover with aluminum foil to make sure the streusel does not burn. Bake for an additional 15 - 25 minutes until a toothpick comes out clean.
  17. Let cool.
  18. Cover and store at room temperature.
Notes
Layer Order from bottom to top:
Half the cake batter
Cinnamon Filling
Half the chocolate chips
Half the cake batter
Half the chocolate chips
Streusel Topping
Recipe by Birch Tree Baking at https://www.birchtreebaking.com/banana-chocolate-chip-crumb-cake/