Banana Crumb Coffee Cake (Printable Version)
Moist banana coffee cake with buttery cinnamon crumb topping, great for breakfast or an afternoon treat.
# What You Need:
→ For the Cake
01 - 1 1/2 cups all-purpose flour
02 - 1 teaspoon baking powder
03 - 1/2 teaspoon baking soda
04 - 1/4 teaspoon salt
05 - 1/2 teaspoon ground cinnamon
06 - 1/2 cup unsalted butter, softened
07 - 3/4 cup granulated sugar
08 - 2 large eggs
09 - 1 teaspoon vanilla extract
10 - 3 ripe bananas, mashed
11 - 1/2 cup sour cream
→ For the Crumb Topping
12 - 1/2 cup all-purpose flour
13 - 1/3 cup light brown sugar, packed
14 - 1 teaspoon ground cinnamon
15 - 1/4 cup unsalted butter, cold and cubed
→ For the Glaze (optional)
16 - 1/2 cup powdered sugar
17 - 1 to 2 tablespoons milk
# How To Make It:
01 - Preheat oven to 350°F. Grease a 9-inch square baking pan or line with parchment paper.
02 - In a medium bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon for the cake.
03 - In a large bowl, beat the softened butter and granulated sugar until light and fluffy. Add eggs one at a time, then mix in vanilla extract.
04 - Stir in the mashed bananas and sour cream until evenly combined.
05 - Gradually add the dry ingredients to the wet mixture, mixing until just incorporated. Do not overmix.
06 - Pour the batter into the prepared baking pan and smooth the surface evenly.
07 - In a separate bowl, combine the flour, brown sugar, and cinnamon for the crumb topping. Cut in the cold butter with a pastry cutter or forks until the mixture resembles coarse crumbs.
08 - Evenly sprinkle the prepared crumb mixture over the cake batter.
09 - Bake for 35 to 40 minutes or until a toothpick inserted in the center emerges clean.
10 - Allow the cake to cool in the pan for 15 minutes. If desired, whisk powdered sugar with 1 to 2 tablespoons milk to form a glaze and drizzle over the cooled cake.
11 - Slice and serve at room temperature.
# Helpful Hints:
01 -
- When the crumb topping bakes up golden and crispy, it feels like you’ve pulled off a pastry shop secret at home.
- It’s ridiculously forgiving—those bananas hiding in your pantry make the cake springy and moist, even on a lazy day.
02 -
- If you overmix the batter, your cake may turn disappointingly dense—mix just until things come together.
- Cubing the crumb topping butter straight from the fridge makes the crunchy bits irresistible, and I once tried soft butter—never again.
03 -
- A small offset spatula makes spreading the thick batter and crumb topping a breeze.
- If you crave a stronger cinnamon hit, add a dash to the glaze as well—no one will complain.