Hazelnut Banana Cake

This Healthy High Protein Hazelnut Banana Cake is the perfect dessert or snack for the holidays and beyond! Made with mashed ripe bananas, flour, and boosted with protein powder, this cake is moist, delicious, and sneakily nutritious. Top it with a creamy hazelnut frosting made with Nutella for a treat that’s as indulgent as it is wholesome.

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Healthy High Protein Hazelnut Banana Cake

Maybe it’s just me but November has been one fast moving month! With Christmas around the corner, many of my friends celebrating American Thanksgiving and the start of these dark and cold days becoming a regular, I feel like we could use a protein snack and this cake is (sneakily) just that! I love love my friends over at Botanica Health and their amazing protein powders. So many of you have asked if my protein recipes actually need the protein powders and my answer is almost always the same. Are you looking to increase your protein intake and still want dessert? Well, there’s your answer. Adding the powder to your desserts will help keep blood sugar at bay.

I love decreasing the amount of sugar I add to my desserts because honestly we just don’t need to add that much sugar. Especially when we are baking with ripe bananas. Bananas are sweet enough on their own!! I used my homemade Nutella and a pinch of salt to the frosting and my goodness that was a good idea! This cake is just enough sweet and salty and everything in between. If you want to have your cake and eat protein too – this is the recipe for you!

Healthy Hazelnut Banana Cake Ingredients

  • Olive Oil: Keeps the cake moist and tender while adding richness and healthy fats.
  • White & Brown Sugar: Work together to provides sweetness, fluffy texture and caramel-like depth and keep the cake extra moist.
  • Mashed Bananas: Naturally sweetens the cake while adding moisture and a delicious banana flavor.
  • Eggs: Provide structure and stability, helping the cake rise and hold together. Use flax eggs 1:1 if you want to keep this recipe vegan.
  • Vanilla: Enhances the flavors with a warm and sweet aroma.
  • Flour: Forms the structure of the cake; can be adapted to suit dietary preferences. I went with a gluten free all purpose flour as per usual but you can use whatever flour you have on hand.
  • Protein Powder: Boosts the nutritional value, making this a satisfying and healthier dessert. I used my favorite Botanica Health!
  • Baking Powder: Helps the cake rise, creating a light and fluffy texture.
  • Baking Soda: Reacts with acidic ingredients to ensure the cake rises with a tender crumb.
  • Cinnamon: Adds a warm, cozy spice that complements the bananas and hazelnuts.
  • Salt: Balances the sweetness and enhances the overall flavor of the cake.
  • Roasted Hazelnuts: Provide a delightful crunch and nutty flavor that pairs perfectly with banana and Nutella.

Frosting Ingredients

  • Butter: Forms the creamy base of the frosting, giving it a rich and smooth texture. Use dairy free butter sticks if you’d like to keep this recipe dairy free.
  • Homemade Nutella: Adds a luscious chocolate and hazelnut flavor to the frosting. Here is my recipe for this delicious spread!
  • Icing Sugar: Sweetens the frosting while creating a smooth, fluffy consistency.
  • Vanilla: Adds depth and balance to the sweetness in the frosting.
  • Salt: Enhances the chocolate and hazelnut flavors without making the frosting overly sweet.
  • Milk: Softens the frosting for the perfect spreadable consistency. Use plant based milk such as soy or oat if you want to make this dairy free.
  • Shaved Chocolate and Chopped Hazelnuts: Add texture and a visually stunning garnish.

How To Make This High Protein Healthy Hazelnut Banana Cake

Prepare the Pan and Preheat the Oven

Set your oven to 350°F and line an 8×8 baking pan with parchment paper. This will prevent sticking and make it easier to remove the cake later.

Mix the Wet Ingredients

In a large bowl, whisk together olive oil, white sugar, brown sugar, and mashed bananas until smooth. Add eggs and vanilla extract, and whisk again until fully combined.

Combine the Dry Ingredients

Sift flour, protein powder, baking powder, baking soda, cinnamon, and salt into the wet ingredients. Gently fold until the batter is smooth and just combined. Stir in chopped hazelnuts for added crunch.

Bake and Frost the Cake

Pour the batter into the prepared pan, smoothing the top. Bake for 55-60 minutes, or until a toothpick inserted into the center comes out clean. Cool the cake completely before frosting. To make the frosting, beat together butter and Nutella until fluffy, then gradually mix in icing sugar, vanilla, salt, and milk. Spread the frosting over the cooled cake and garnish with chopped hazelnuts and shaved chocolate. Enjoy!

Banana Cake Frosting Options

This cake pairs beautifully with my homemade Nutella frosting, but you could also try making a Greek yogurt frosting for additional protein or a chocolate ganache for extra decadence. 

Why You Should Make This Hazelnut Banana Cake

There is never a reason not to love a dessert recipe that also is high in protein! It’s just a win-win situation my friends. This Hazelnut Banan Cake is the perfect dessert or snack when you need a little sugar boost, finishing a workout or just want to share something sweet and healthy with people you like! It’s super easy to make and really fun to customize – make this recipe all your own.

Banana Cake Frequently Asked Questions

How to ripen bananas quickly?
Place bananas in a warm oven (about 300°F) for 15-20 minutes, or microwave them in 30-second bursts until soft.

What makes this banana bread healthy?
This recipe uses less sugar, protein powder, and healthier flour like oat or almond flour, making it a nutritious alternative to traditional banana bread recipes.

Banana cake or banana bread—what’s the difference?
Banana cake is lighter and sweeter, often with frosting, while banana bread is denser and more rustic.

Tips to Make The Best Hazelnut Banana Cake

  • Use overripe bananas—they’re easier to mash and naturally sweeter.
  • Don’t overmix the batter; it keeps the cake tender.
  • Toast your hazelnuts for a deeper flavor.

Did you make this healthy banana bread recipe?

Let me know in the comments below! Share your thoughts, substitutions, and tips! Try these healthy desserts next:

TERI ANN CARTY

Food Photographer and Recipe Developer based in Toronto, Canada. 

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High Protein Hazelnut Banana Cake

This Healthy High Protein Hazelnut Banana Cake is the perfect dessert or snack for the holidays and beyond! Made with mashed ripe bananas, flour, and boosted with protein powder, this cake is moist, delicious, and sneakily nutritious. Top it with a creamy hazelnut frosting made with Nutella for a treat that’s as indulgent as it is wholesome.
5 from 1 vote
Print Pin Rate
Servings: 9 servings
Author: Teri-Ann Carty
Prep Time: 15 minutes
Cook Time: 1 hour
Total Time: 1 hour 15 minutes

Equipment

  • 8x8 baking dish, oven, stand or electric mixer

Ingredients

Cake Ingredients

  • ½ cup olive oil
  • ¼ cup white sugar
  • ¼ cup brown sugar
  • 2 bananas mashed approximately 1 cup
  • 2 eggs room temperature
  • 1 tbsp vanilla
  • cup flour
  • ¼ cup protein powder
  • 1 tsp baking powder
  • ¾ tsp baking soda
  • 1 tsp cinnamon
  • ½ tsp salt
  • ½ cup roasted hazelnuts roughly chopped

Frosting Ingredients

  • ½ cup butter softened to room temperature
  • ½ cup homemade Nutella
  • 2 cups icing sugar
  • 1 tsp vanilla
  • pinch of salt
  • 2 tbsp milk
  • shaved chocolate and chopped hazelnuts to garnish

Instructions

  • Preheat oven to 350d. Line a 8x8 pan with parchment paper and set aside.
  • Add olive oil, banana and sugars to a medium large bowl. Use a whisk to vigorously combine.
  • Add eggs and vanilla and whisk again
  • Place a fine meshed sieve over the bowl. Add flour, protein powder baking powder and soda, cinnamon and salt to the sieve. Use the heal of your hand to tap sieve over wet ingredients.
  • Whisk dry ingredients into wet until a smooth batter forms. Fold in chopped hazelnuts.
  • Add batter to prepared pan. Tap the pan firmly to release any air bubbles.
  • Bake for 55-60 minutes until a toothpick comes out clean from the centre of the cake.
  • Allow the cake to cool completely before frosting.
  • Add butter and nutella to the bowl of a stand mixer with the paddle attachment.
  • Beat together until smooth and fluffy.
  • Add 1/2 cup icing sugar at a time until incorporated. Scrape down sides as needed.
  • Add vanilla, salt and milk. Beat again until smooth.
  • Remove cake from the pan. Frost the cake with as much frosting as you desire. You can freeze leftover frosting!
  • Finish cake with chopped hazelnuts and shaved chocolate.

Notes

I made this cake with protein powder but you could omit if desired. If omitting, add 1/4 cup more flour.

Nutrition

Serving: 1g | Calories: 677kcal | Carbohydrates: 90g | Protein: 8g | Fat: 33g | Saturated Fat: 14g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 15g | Trans Fat: 0.4g | Cholesterol: 69mg | Sodium: 637mg | Potassium: 273mg | Fiber: 3g | Sugar: 69g | Vitamin A: 401IU | Vitamin C: 3mg | Calcium: 87mg | Iron: 3mg

*Macros are provided as an estimate for convenience. Your final numbers will vary depending on ingredient brands, substitutions, and how you portion the recipe.

3 Responses

  1. Wa s going to ask about no protein powder, but you answered my question in your comments. Thanks. Maybe more nuts!! Yum.

  2. 5 stars
    I’m on a roll this week with your recipes. Today, made this banana hazelnut cake and elected not to add the frosting (no doubt would be heavenly with it, but wanted to reduce the fat content – and honestly, it was fantastic without frosting). The cake was incredibly moist with a soft crumb structure. It only took 35 minutes to bake in my convection oven, so would suggest checking much earlier than the indicated 55 minutes. I used chocolate protein powder (what I had on hand) and I am not disappointed with the chocolate undertones of the cake. I also added 1 tsp expresso powder with gives a hint of coffee. This is a keeper. For those reading the comment section, I have also made the red lentil tomato and sausage soup along with the almond butter (used almond and hazelnut chocolate butters) protein bars. Thanks for sharing such great recipes. We are well fed in our home!

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