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Easy Banana Cake – this fluffy and moist sheet cake has a light mascarpone frosting on top and is ready in under 30 minutes! A perfect cake to use all those overripe bananas.

Easy Banana Cake - this fluffy and moist sheet cake has a mascarpone frosting on top and is ready in under 30 mins! A perfect cake to use overripe bananas.

I don’t know why I end up with so many overripe bananas every week?!

I buy some because I think they’ll make a great snack and then nobody eats them. Perhaps I should stop buying bananas … but that would also mean no more deliciousย Banana Muffins,ย Banana Nut Bread, or banana cake like this one and I think that would be very sad!

Today’s recipe is a really moist banana cake with a delicious mascarpone frosting! This cake is smooth but not dense because of the creamed butter and sugar and the silky frosting on top is not too sweet, just perfect!

Easy Banana Cake - this fluffy and moist sheet cake has a mascarpone frosting on top and is ready in under 30 mins! A perfect cake to use overripe bananas.

Sheet cakes like this or my Lemon Sheet Cake are one of my favorite things to bake! They don’t take much time to make, 20-25 minutes in the oven and they’re done vs. 50 minutes for a bundt or loaf cake, the amount of frosting or icing on top is perfect and they are super easy to make from scratch.

Cakes like this are also perfect for parties, I decorated mine quite minimalistic with a few banana slices but you definitely can get creative. Another big plus is that you don’t need special equipment like you’d need for a fancy layered cake!

I love layered cakes but they are more time-intensive than a sheet cake and you need all those special cake things like a piping bag, tips, a cake board, and patience (which I don’t have most of the time). A sheet cake is much more forgiving!

Easy Banana Cake - this fluffy and moist sheet cake has a mascarpone frosting on top and is ready in under 30 mins! A perfect cake to use overripe bananas.

This easy banana cake is made in a 9 x 13-inch baking pan (this one is my favorite because it comes with a lid) and is lighter, more delicate, and in my opinion more flavorful than banana bread. Making the frosting on top with mascarpone instead of cream cheeseย gives it a milder not as sharp taste that goes perfectly with the banana cake.

My biggest tip when it comes to making a cake recipe is to follow the ingredients and steps that are called for. For this recipe, use overripe bananas with brown spots and cream the sugar and butter together until fluffy and light, just keep beating until the color of the mixture changes from yellowish to white.

You’ll be rewarded with the BEST banana cake!

Easy Banana Cake - this fluffy and moist sheet cake has a mascarpone frosting on top and is ready in under 30 mins! A perfect cake to use overripe bananas.

Here are more of my favorite banana recipes

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5 from 5 votes

Easy Banana Cake Recipe

Easy Banana Cake – this fluffy and moist sheet cake is has a light mascarpone frosting on top and it ready in under 30 minutes! A perfect cake to use all those overripe bananas.
Prep Time: 10 minutes
Cook Time: 20 minutes
Total Time: 30 minutes
Servings: 16

Ingredients 

For the banana cake:

  • 1/2 cup unsalted butter, room temperature
  • 1 cup granulated sugar
  • 2 large eggs, room temperature
  • 1 1/2 cups mashed ripe bananas, 3 medium ones
  • 1 cup buttermilk, or 1 cup milk + 1 tbsp lemon juice
  • 1 tsp vanilla extract
  • 2 cups all-purpose flour
  • 1 tsp baking soda
  • 1/4 tsp salt

For the frosting:

  • 6 Tbsp unsalted butter, room temperature
  • 1 1/2 cups confectioners’ sugar, sifted
  • 1 tsp vanilla extract
  • 4 oz cold mascarpone, or cream cheese

Instructions 

  • Preheat your oven to 350ยฐF (180ยฐC). Grease a 9×13-inch baking pan. Set aside.
  • In the bowl of a stand mixer fitted with the paddle attachment, cream butter and sugar together at medium-high speed until light and fluffy, about 3-4 minutes.
  • Add eggs, mashed bananas, buttermilk, and vanilla extract. Mix at low speed until combined.
  • In a small bowl combine flour, baking soda, and salt.
  • Add flour mixture in three additions to the wet mixture, mix just until combined.
  • Pour batter into the baking dish and bake for 20-25 minutes. When the cake is done a skewer inserted in the middle should come out clean with only a few crumbs attached. Let the cake cool down completely before frosting it.
  • To make the frosting, beat together butter and confectioners’ sugar in the bowl of a stand mixer fitted with the paddle attachment until light and fluffy.
  • Add vanilla extract and mascarpone and beat until blended. Frost cooled cake.

Video

Nutrition

Calories: 307kcal | Carbohydrates: 41g | Protein: 4g | Fat: 15g | Saturated Fat: 9g | Cholesterol: 56mg | Sodium: 145mg | Potassium: 120mg | Fiber: 1g | Sugar: 27g | Vitamin A: 478IU | Vitamin C: 2mg | Calcium: 37mg | Iron: 1mg
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About Julia Foerster

Hi, I'm Julia! Born in Germany, I call Canada now my home and love to share my favorite dishes with you! Here you'll find hundreds of recipes, all made from scratch, with lots of tips and detailed step-by-step instructions.

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5 from 5 votes (3 ratings without comment)

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9 Comments

  1. 5 stars
    Thank you for a quick and easy recipe, it was perfect– a crowd pleaser for sure, kids and adults loved it!

  2. 5 stars
    Came out perfect! So pleased – just that bit different from โ€œbanana breadโ€ that I was looking for.

  3. I like what I see :)! Love moist desserts and yours is also covered in mascarpone frosting! That must definitely be delicious! :)

    1. It was really hard to stop eating after two pieces, my husband had to take the leftovers to work for his co-workers otherwise I’d have eaten the whole thing! I love everything with mascarpone!!