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a close up of a squares of banana poppy seed cake with white frosting. in the background is a banana and another square of cake

Banana Poppy Seed Cake with Vanilla Buttercream

Author: Our Tasty Kitchen
This moist and delicious Banana Poppy Seed Cake is topped with a creamy Vanilla Buttercream. A simple and tasty recipe that's great for breakfast, snacking or dessert!
Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Servings16 squares

Ingredients
  

Banana Poppy Seed Cake:

  • 4 bananas mashed (about 1 1/2 cups)
  • 1/2 cup butter
  • 1 cup sugar
  • 2 eggs
  • 2 tsp vanilla
  • 1/2 cup sour cream
  • 1 1/2 cups all purpose flour
  • 1 tsp baking soda
  • 1/2 tsp salt
  • 2 tbsp poppy seeds

Vanilla Buttercream:

  • 1/2 cup butter
  • 2 cups confectioner's sugar
  • 1/2 tsp vanilla

Instructions
 

  • Preheat your oven to 350 degrees F.
  • Line an 8 x 8 baking pan with parchment paper. Set aside.
  • Mash the bananas. Set aside.
  • Using an electric mixer cream the butter and sugar until creamy.
  • Then add the eggs, vanilla and sour cream, mixing until smooth.
  • Fold in the mashed bananas.
  • In a separate bowl whisk together the flour, baking soda, salt and poppy seeds.
  • Now add these dry ingredients to the wet ingredients and mix until just combined, don’t over mix the batter.
  • Pour the batter into the prepared baking pan and bake for 50 minutes. The cake is done when the top is golden and the centre is tight, and a toothpick inserted into the centre comes out clean.
  • While the cake is baking, make the buttercream. Use an electric mixer and cream together the butter, confectioner's sugar and vanilla until smooth and creamy.
  • When the cake is done baking, remove it from the oven and let cool completely before frosting, at least 1 hour.
Keyword banana cake, banana poppy seed cake
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