Ingredients:

  • 3 ripe bananas, mashed (about 1 ½ cups or 400g)
  • 1/2 cup (115g) unsalted butter, melted
  • 1/2 cup (100g) granulated sugar
  • 1/4 cup (50g) packed brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 teaspoon baking soda
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 1/2 cups (190g) all-purpose flour
  • 1/2 cup (65g) all-purpose flour for crumb topping
  • 1/4 cup (50g) granulated sugar for crumb topping
  • 1/4 cup (50g) packed brown sugar for crumb topping
  • 1/4 teaspoon cinnamon for crumb topping
  • 1/4 cup (60g) unsalted butter, cubed for crumb topping

Instructions:

  1. Preheat the oven to 350°F (175°C) and grease the cake pan.
  2. In a mixing bowl, mash the ripe bananas until smooth.
  3. Stir in the melted butter, granulated sugar, and brown sugar until well combined.
  4. Whisk in the eggs and vanilla extract until smooth.
  5. Add baking soda, baking powder, and salt; mix until incorporated.
  6. Gradually fold in the flour until just combined (avoid overmixing).
  7. In a separate bowl, prepare the crumb topping by combining flour, sugars, and cinnamon.
  8. Cut in the butter until the mixture resembles coarse crumbs.
  9. Pour the banana batter into the prepared pan, spreading evenly.
  10. Sprinkle the crumb topping over the batter evenly.
  11. Bake for 20 minutes or until a toothpick inserted in the center comes out clean.
  12. Let cool in the pan for 5 minutes before transferring to a wire rack to cool completely.