Banana Cake with Chocolate Peanut Butter Icing- Whole Grain

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Although we eat tons of bananas, inevitably some occasionally get by and are too ripe, and need to be used another way. As was the case in the SIX bananas I had get past me. I needed a BIG cake to use all these bananas in, hence this lovely banana cake with chocolate peanut butter icing.

It seemed like a great time to develop a large cake. Especially since we are heading into the season of dinner parties and large group get togethers!

Before you start, it is easiest if we have all ingredients out and ready.

Start with our fats and sugars. Mix well.

Next I throw in the bananas. These are the perfect ripeness, in my humble opinion. 🙂 I used a hand mixer to mix this. I added the bananas and just continued to mix them with the hand mixer.

I made this a one bowl recipe, so I add dry ingredients right on top. Start with your flours on the bottom, then add spices and leaveners on top. Mix them into the flour before mixing all with dry ingredients.

I wanted to use my half sheet pan for this cake. The amount of batter was too much for the pan, so I used my riser. Here is the one from Amazon.

I use parchment on the bottom, then add the riser. I spray all, both bottom and riser.

Batter is ready! Bake until toothpick inserted comes out almost clean. With whole wheat baked goods, you really want them to under bake just a touch!

Next up is the icing. Put everything in one bowl. You can use a hand or stand mixer. Honestly, if you are feeling strong enough, mix by hand!

Beat on high speed until it is smooth and creamy. Also, add milk until you get to the consistency you are looking for.

I like to put dollops all over the cake to spread it. I think it makes it easier.

Spread evenly.

Isn’t it beautiful?

You will also notice, in order to make it a little healthier, I use only a small amount of icing. I still want to be able to enjoy it, but not go overboard. This much still gives the flavor, without it being over powering.

Next, try and eat only one piece.

I prefer mine served with milk!

Well, you can see I didn’t quite stick with one piece. I think it was more like 4 by the time the boys came home!

Are you a fan of chocolate and peanut too? How about these chocolate peanut butter cheesecake brownies?

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Banana Cake with Chocolate Peanut Butter Icing

This makes a large, amazing banana cake. It is perfect for dinner parties or other large gatherings, as it makes a half sheet pan size cake (13×18). It's a large cake! The chocolate peanut butter icing is the perfect addition. Plus, of course it is a whole grain recipe that does not taste like one!
Course Dessert
Cuisine American
Keyword banana and chocolate, banana and peanut butter, banana cake, banana recipes, whole grain dessert, whole wheat desserts, whole wheat recipe ideas
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 24 servings
Author Amy- A Red Spatula


  • 5 cups whole wheat pastry flour
  • 1 cup all purpose flour
  • 2 1/2 teaspoons baking powder
  • 2 teaspoons baking soda
  • 1 teaspoon cinnamon
  • 1 teaspoon salt
  • 1 1/4 cup butter, softened
  • 1 1/4 cup granulated sugar
  • 3/4 cup brown sugar
  • 6 bananas
  • 6 eggs
  • 1 tablespoon vanilla
  • 3 cups buttermilk

Chocolate peanut butter icing

  • 1/2 cup butter
  • 2 cups powdered sugar
  • 2/3 cup cocoa powder
  • 1/2 cup peanut butter creamy or crunchy, your choice. It is a pretty serious debate in our house.
  • 1 teaspoon vanilla
  • milk as needed


  • Preheat oven to 350 degrees.
    Prep sheet pan by lining with parchment paper and spraying the paper and pan riser with pan spray or softened butter.
    In small/medium bowl combine dry ingredients- flours, baking powder, baking soda, salt and cinnamon.
    In another larger bowl, mix butter and sugars. You can do this with a stand mixer, hand mixer or even by hand. It will be a good workout if you decide to do it by hand! Beat the butter and sugars until they are light and fluffy. Add in bananas and mix again. You can mush them before hand, but it is so simple to throw them in and mix them. Next is eggs and vanilla. Blend this only until combined. Then add dry ingredients. Now, only blend these until they just come together, you don't want to overmix and baked goods with whole wheat flours. Last is your buttermilk. Again, careful not to overmix.
    Pour batter into pan. Spread carefully, but don't stress on it being completely flat, it will do this as it bakes.
    Now, bake until a toothpick inserted in the center comes clean. I actually like to under bake just a touch. Whole grain baked goods can dry out quickly. It is good to underbake just a little.
    Place on a cooling rack. Within a minute or 2, remove the riser.
    Allow to cool before icing.

Chocolate peanut butter icing

  • Mix your butter, powdered sugar and cocoa powder until light. It will be dry, but don't worry as we keep adding in ingredients, it will soften. Add in peanut butter and vanilla and continue to mix. Last is milk. Add in as needed. This will depend on how soft your want you icing.
    If it makes it, you will be tempted to eat it all, ice your cake :).

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