Name: Moist Peanut Butter Banana Cake with Caramel Icing Recipe
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 1 ½ cups mashed ripe banana (about 3 bananas); ¾ cup packed dark brown sugar; 1 large egg; ½ cup buttermilk; ½ cup smooth peanut butter (like Jif or Skippy!); ⅓ cup canola oil; 2 teaspoons vanilla essence (vanilla bean paste preferred); 1 ½ cups all-purpose flour; 1 teaspoon baking powder; ½ teaspoon baking soda; ½ teaspoon kosher salt; 4 tablespoons unsalted butter; ½ cup packed dark brown sugar; ¼ cup heavy whipping cream; Pinch of salt; 1 cup powdered sugar, sifted if lumpy; Flaky salt, for garnish (optional)

Print Recipe· 3.9 from 9 reviews

If you’re searching for a dessert that combines the nostalgic flavors of peanut butter and banana with a luscious sweet finish, look no further than this Moist Peanut Butter Banana Cake with Caramel Icing Recipe. It’s everything you want in a cake—rich, tender, loaded with banana goodness, and topped with a caramel icing that melts in your mouth, creating a perfect balance of sweet and salty. Whether you’re indulging in a cozy weekend treat or impressing friends at a gathering, this cake never fails to delight with its warm, comforting flavors and irresistibly moist texture.

Ingredients You’ll Need

The image shows a top-down view of various ingredients arranged on a white marbled surface. There are twelve bowls and cups, each holding different items: a bowl with a smooth, creamy light brown peanut butter, a glass bowl with mashed yellow bananas and a spoon inside, a white bowl filled with loose white flour with a whisk resting on it, a bowl with powdery white sugar being sifted with a small metal strainer on top, a bowl of fine white powder, a small dish with a chunk of pale yellow butter, a small bowl with dark liquid vanilla extract, a small dish with white salt, a yellow bowl holding a raw egg yolk, a bowl with brown sugar, a small glass jug of milk, and a cup with a clear yellow liquid. Two ripe bananas lie at the top right of the setup. The overall color palette includes creamy, brown, white, and yellow tones, with a clean and bright look. photo taken with an iphone --ar 4:5 --v 7

Gathering the right ingredients is the first exciting step to baking this delightful cake. Each component plays an essential role, from providing moisture to enhancing flavor or creating the perfect crumb and icing that complements every bite.

1 ½ cups mashed ripe banana: Packed with natural sweetness and moisture that makes this cake delectably soft.
¾ cup packed dark brown sugar: Adds deep caramel notes and moisture to enrich the flavor profile.
1 large egg: Helps bind the ingredients and gives structure to the cake.
½ cup buttermilk: Adds tang and tenderness, balancing the sweetness perfectly.
½ cup smooth peanut butter: Brings that creamy, nutty richness that defines this recipe’s character.
⅓ cup canola oil: Keeps the cake wonderfully moist without weighing it down.
2 teaspoons vanilla essence: Infuses a subtle aromatic warmth to elevate all flavors.
1 ½ cups all-purpose flour: The base that gives the cake structure without overpowering moisture.
1 teaspoon baking powder: Helps the cake rise perfectly light and fluffy.
½ teaspoon baking soda: Works with the buttermilk for extra lift and tenderness.
½ teaspoon kosher salt: Balances sweetness and enhances all the flavors.
4 tablespoons unsalted butter: Essential for the luscious caramel icing.
½ cup packed dark brown sugar: For the caramel’s depth and velvety richness.
¼ cup heavy whipping cream: Creates a silky smooth texture in the caramel icing.
Pinch of salt: Accentuates the caramel’s flavor.
1 cup powdered sugar: Adds sweetness and smoothness to the icing, sift if needed.
Flaky salt (optional): For a gourmet finishing touch that enhances every bite with subtle crunch and saltiness.

How to Make Moist Peanut Butter Banana Cake with Caramel Icing Recipe

Step 1: Prepare Your Pan and Preheat the Oven

Begin by positioning your oven rack in the center and preheating it to 350°F. This ensures an even bake. Spray an 8×8-inch square baking pan with a nonstick spray and line it with parchment paper. Letting the paper hang over the edges will make it simple to lift the cake out later. Setting this up now means your cake will slide right out after baking without any fuss.

Step 2: Mix the Wet Ingredients

In a large bowl, whisk together the mashed ripe bananas, dark brown sugar, egg, buttermilk, smooth peanut butter, canola oil, and vanilla essence. This harmonious blend invites the cake’s moist, rich texture to develop. Proper whisking ensures all flavors marry beautifully and every bite is packed with banana and peanut butter goodness.

Step 3: Add the Dry Ingredients

Next, incorporate the all-purpose flour, baking powder, baking soda, and kosher salt into the wet mixture. Stir gently until just combined, being careful not to overmix. This will keep your cake tender and light, avoiding a dense or tough crumb. The chemical reaction between baking soda and buttermilk helps your cake rise and stay fluffy.

Step 4: Pour Batter and Smooth

Pour the batter into your prepared pan and gently tap it on the counter to release any air bubbles hiding beneath the surface. Use an offset spatula to smooth out the top if needed, setting the stage for an even bake and a beautifully flat canvas for your caramel icing.

Step 5: Bake and Cool the Cake

Bake the cake for 40 to 45 minutes, or until a toothpick inserted into the center comes out clean. Once baked, let it rest in the pan for 15 minutes to settle, then transfer to a wire rack to cool completely. Cooling fully is key before icing, so your caramel does not melt away but instead sets with that perfect glossy finish.

Step 6: Make the Caramel Icing

While the cake cools, start your caramel icing. In a small saucepan over medium heat, melt the unsalted butter, brown sugar, and heavy cream together. Bring it gently to a boil and cook for about 2 to 3 minutes. After removing from heat, let it cool slightly and stir occasionally. Then whisk in the pinch of salt and sifted powdered sugar until the icing is silky smooth and spreadable. This luscious icing is where the magic intensifies, melding sweet and salty tones flawlessly.

Step 7: Ice and Garnish Your Cake

Spread the caramel icing immediately over the cooled cake using the back of a spoon to create lovely swoops and waves. If you’re feeling fancy, sprinkle a pinch of flaky salt on top to add subtle texture and a burst of flavor. Allow the icing to set for at least 30 minutes before slicing and serving to enjoy that perfect bite of cake and caramel interaction.

How to Serve Moist Peanut Butter Banana Cake with Caramel Icing Recipe

A square piece of light golden brown cake sits on a cooling rack over a white marbled surface. The cake is covered with a thick, smooth layer of light tan frosting, spread in wide, curved strokes that create a soft texture. On top of the frosting, there are scattered flakes of coarse white sea salt, adding a contrast in texture and color. Around the cake, there is a small round white bowl of salt, a white bowl with light brown creamy frosting, and a metal whisk resting inside it. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Enhance your cake’s presentation and flavor by adding a few creative garnishes. Besides the optional flaky salt, try scattering some chopped roasted peanuts for crunch or a drizzle of melted peanut butter for an extra layer of indulgence. Fresh banana slices alongside add a burst of natural sweetness and freshness that pairs beautifully with the caramel.

Side Dishes

This cake pairs wonderfully with simple, complementary sides. A scoop of vanilla bean ice cream elevates the experience with cold creaminess, contrasting the warm cake. Alternatively, a cup of bold coffee or a fragrant chai tea balances the richness of the caramel and peanut butter flavors, making it ideal for afternoon moments or dessert after dinner.

Creative Ways to Present

If you’re serving this cake at a party or special occasion, consider cutting it into small, elegant wedges and placing each on individual dessert plates with a drizzle of caramel sauce around the edges. You can also stack thin slices with layers of peanut butter cream between to create mini cake sandwiches. The Moist Peanut Butter Banana Cake with Caramel Icing Recipe is versatile and always crowd-pleasing.

Make Ahead and Storage

Storing Leftovers

To keep your cake tasting fresh and moist, store it covered at room temperature for up to 3 to 4 days. Make sure it’s protected from air to prevent drying out. If your home is warm or humid, placing it in the fridge is wise, where it will keep well for up to one week without losing its texture or flavor.

Freezing

This cake freezes beautifully, making it perfect for planning ahead. Wrap the cooled, uniced cake tightly in plastic wrap and aluminum foil before freezing. When ready to enjoy, thaw it overnight in the fridge and then frost with fresh caramel icing. You can also freeze individual slices for easy portions later.

Reheating

If you like your cake slightly warm, gently reheat slices in the microwave for about 15-20 seconds. This softens the caramel icing and melts the peanut butter just a bit, yielding that freshly-baked taste that feels like a cozy hug. Just be careful not to overheat it, or it may become too soft or lose its texture.

FAQs

Can I substitute peanut butter with almond butter?

Absolutely! Almond butter offers a different, slightly milder nutty flavor that still works wonderfully in this cake. Keep the quantity the same for best results, and expect a lovely variation on the moist texture and rich taste.

What if I don’t have buttermilk?

No worries! You can make a quick buttermilk substitute by adding 1 tablespoon of lemon juice or white vinegar to ½ cup of milk. Let it stand for 5 minutes before using. This helps replicate buttermilk’s acidity, which tenderizes the cake.

How ripe should the bananas be?

Go for bananas with plenty of brown spots or completely brown skin. The riper, the sweeter and more flavorful the banana mash will be, which is key to the Moist Peanut Butter Banana Cake with Caramel Icing Recipe’s delicious taste.

Is there a way to make this cake gluten-free?

You can replace the all-purpose flour with a gluten-free flour blend, preferably one meant for baking. Make sure it contains xanthan gum or add some separately to maintain the cake’s structure and moisture.

Can I make the caramel icing ahead of time?

Yes, you can prepare the icing a few hours ahead and store it in the fridge. Before spreading, gently warm it to soften and then whisk to regain its smooth texture. This flexibility makes dessert prep easier when entertaining.

Final Thoughts

This Moist Peanut Butter Banana Cake with Caramel Icing Recipe is a treasure that brings comfort and joy with every bite. Its beautiful balance of flavors and textures will quickly make it a favorite in your baking repertoire, perfect for sharing and savoring. I encourage you to try this recipe—you might just find your new go-to cake for every occasion!