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Baking recipe · from the recipe book

Banana Sheet Cake with Cocoa Ribbon

A moist, tender banana sheet cake with a fudgy cocoa-cinnamon ribbon baked through the middle and melty chocolate chips on top.

Banana Sheet Cake with Cocoa Ribbon

Ingredients

  • 3½ medium400 gBananavery ripe, mashed
  • 2⅓ cups300 gAll-purpose flour
  • ⅔ cup packed150 gBrown sugarpacked
  • ½ cup100 gGranulated sugardivided
  • ½ cup113 gUnsalted buttermelted and slightly cooled
  • 2 large100 gEggsroom temperature
  • ½ cup120 gPlain yogurt, low-fatroom temperature
  • 2 tsp8 gVanilla extract
  • 1⅛ tsp5 gBaking soda
  • ¾ tsp4 gBaking powder
  • ½ tsp3 gSalt
  • ¼ cup25 gUnsweetened cocoa powder
  • 1⅛ tsp3 gGround cinnamon
  • ½ cup80 gSemisweet chocolate chipsdivided

Steps

  1. Heat the oven to 350°F (175°C). Grease a 9x13-inch pan and line the bottom with parchment.
  2. Make the cocoa filling first: in a small bowl, stir together the unsweetened cocoa powder, the cinnamon and half of the granulated sugar until no lumps remain. Set the cocoa filling aside.
  3. In a medium bowl, whisk the flour, baking soda, baking powder and salt to make the flour mixture.
  4. In a large bowl, whisk the mashed banana, the brown sugar and the remaining half of the granulated sugar. Whisk in the melted butter, then the eggs one at a time, then the yogurt and vanilla until smooth.
  5. Fold the flour mixture into the banana mixture with a spatula just until no dry streaks remain; do not overmix.
  6. Spread half of the batter in the pan. Sprinkle the cocoa filling evenly over it, then scatter half of the chocolate chips on top.
  7. Dollop the remaining half of the batter over the filling and gently spread to cover. Run a knife through in a few loose S-shapes to ribbon the cocoa filling, then scatter the remaining half of the chocolate chips over the top.
  8. Bake 32 to 38 minutes, until golden and a toothpick in the center comes out clean of wet batter (melted chocolate is fine).
  9. Cool the cake in the pan on a rack for at least 1 hour, then cut into 12 slices.

Food safety: Don't taste raw dough or batter: raw flour and raw eggs can carry germs.

Contains: Milk, Egg, Gluten. Some brands contain soy.

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Saved in the Every Helping recipe book on October 24, 2026.

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