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small batch banana coffee cake with cinnamon streusel

Small Batch Banana Coffee Cake

Small Batch Banana Coffee Cake is the perfect treat when you have just one ripe banana on hand! This moist and soft banana cake is topped with a delicious cinnamon sugar crumb for that classic coffee cake flavor. It’s an easy, one-bowl recipe that is perfect for a breakfast or a sweet treat.
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Total Time 55 minutes
Servings 8 pieces

Ingredients
  

Cinnamon Sugar Crumb Mix

  • 1/4 cup (30 grams) All-purpose flour
  • 3 tablespoons (37.5 grams) Brown sugar
  • 1 teaspoon Ground cinnamon
  • 1/4 teaspoon Ground cardamom
  • pinch of Salt
  • 3 tablespoons (42 grams) Unsalted butter, room temperature and cubed

Banana Batter

  • 1 cup (120 grams) All-purpose flour
  • 1/2 teaspoon Baking powder
  • 1/4 teaspoon Baking soda
  • 1/4 teaspoon Salt
  • 1 large banana, ripe
  • 1/4 cup (50 grams) Granulated Sugar
  • 1 tablespoon (12.5 grams) Brown Sugar
  • 1/4 cup (58 grams) Unsalted butter, melted
  • 1/4 cup (65 grams) Plain Greek yogurt or sour cream, room temperature
  • 1 Large egg, room temperature
  • 1 teaspoon Vanilla extract

Instructions
 

  • Make the Cinnamon Sugar Crumb: In a bowl, mix flour, brown sugar, cinnamon, cardamom and salt. Add cubed unsalted butter and use a fork or your hands to mix until crumbly. Set aside.
    1/4 cup (30 grams) All-purpose flour, 3 tablespoons (37.5 grams) Brown sugar, 1 teaspoon Ground cinnamon, 1/4 teaspoon Ground cardamom, pinch of Salt, 3 tablespoons (42 grams) Unsalted butter,
  • Dry Ingredients: In a separate bowl, whisk together all-purpose flour, baking soda, baking powder, cinnamon, and a pinch of salt.
    1 cup (120 grams) All-purpose flour, 1/2 teaspoon Baking powder, 1/4 teaspoon Baking soda, 1/4 teaspoon Salt
  • Wet Ingredients: In another bowl, mash one extra-ripe banana until smooth. Stir in melted butter, granulated sugar, brown sugar, plain Greek yogurt (or sour cream), vanilla extract, and an egg until well combined.
    1 large banana,, 1/4 cup (50 grams) Granulated Sugar, 1 tablespoon (12.5 grams) Brown Sugar, 1/4 cup (58 grams) Unsalted butter,, 1/4 cup (65 grams) Plain Greek yogurt or sour cream,, 1 Large egg,, 1 teaspoon Vanilla extract
  • Add the dry ingredients to the wet ingredients, mixing gently until just combined. Be careful not to overmix.
  • Pour half of the batter into a greased or parchment lined loaf pan and spread evenly. Sprinkle some of the cinnamon sugar crumb mixture on top, then add the remaining batter. Finish by generously sprinkling the rest of the crumb topping over the top.
  • Bake at 350°F (175°C) for about 30–35 minutes, or until a toothpick inserted in the center comes out clean. Let the coffee cake cool in the pan for 10 minutes before transferring it to a wire rack.