Prepare to be enchanted by a dessert that seamlessly blends classic comfort with an irresistible twist: this delightful Peanut Butter Upside-Down Banana Cake. Crafted with the remarkable PB2 Organic Powdered Peanut Butter, this cake is an absolute showstopper, crowned with beautifully caramelized sliced bananas nestled in a luscious brown sugar glaze. Each moist, tender bite delivers a symphony of sweet banana and rich peanut butter flavor, making it a treat that transcends seasons. Serve it warm with a generous dollop of stabilized whipped cream or a scoop of vanilla bean ice cream, and watch as it becomes an instant family favorite, perfect for any gathering or a simple weeknight indulgence.

This post is brought to you in partnership with PB2 Foods, a brand I genuinely adore and trust for its exceptional quality and innovative products. As someone who absolutely adores peanut butter, it’s a staple in my pantry, and I’ve been thrilled to incorporate PB2’s versatile powdered peanut butter into countless recipes over the years.
If you’ve followed my culinary adventures for a while, you know my deep appreciation for peanut butter. It’s more than just an ingredient; it’s a source of inspiration! I’ve developed so many fantastic recipes featuring its creamy, nutty goodness that I often joke about renaming my blog to “365 Days of Peanut Butter.” This Banana Upside-Down Cake is just another testament to the magic peanut butter brings to the kitchen, especially when combined with the natural sweetness of bananas.
PB2 Powdered Peanut Butter has become a cherished ingredient in my baking, and for good reason. It offers the full, delicious flavor of traditional peanut butter but with significantly fewer calories and less fat, making it a fantastic choice for those looking to enjoy their favorite treat a little more health-consciously. Its powdered form makes it incredibly easy to incorporate into batters, sauces, and smoothies, ensuring a smooth, consistent flavor distribution without adding excessive moisture or oil. It’s an ingredient that truly enhances a recipe without overpowering it, adding a rich depth of flavor that is simply irresistible.

I’ve showcased PB2 products in a variety of beloved creations. For instance, the PB2 Peanut Butter Powder with Cocoa adds an indulgent chocolate-peanut butter twist to my No Bake Peanut Butter S’Mores Cookies and my festive Peanut Butter Crinkle Cookies. The PB2 Organic Powdered Peanut Butter used in today’s delectable banana cake recipe also shines in other crowd-pleasers like the comforting Peanut Butter and Jelly French Toast Casserole and the ever-popular Peanut Butter Popcorn Balls. And for those who crave a little crunch, PB2’s Crunchy Powdered Peanut Butter was the secret ingredient behind my decadent Peanut Butter Chocolate Lava Cakes.
Why You’ll Love This Peanut Butter Banana Upside-Down Cake
- Unforgettable Flavor Combination: The classic pairing of peanut butter and banana reaches new heights in this cake. The rich, nutty notes of PB2 perfectly complement the sweet, caramelized banana topping.
- Moist and Tender Crumb: Thanks to the precise balance of ingredients, including buttermilk and cake flour, this cake boasts an incredibly moist and tender texture that simply melts in your mouth.
- Visually Stunning: Upside-down cakes always impress! The artfully arranged banana slices create a beautiful, glossy topping that makes for a stunning presentation.
- Versatile Dessert: Perfect for any occasion, from a casual family dessert to a special gathering. It’s comforting, satisfying, and appeals to all ages.
- Easy to Make: While it looks fancy, the steps are straightforward and achievable for bakers of all skill levels.
SAVE THIS PEANUT BUTTER CAKE WITH BANANAS TO YOUR FAVORITE PINTEREST BOARD!

The versatility of PB2 Powdered Peanut Butter extends far beyond cakes and cookies. It’s a fantastic ingredient for creating healthier versions of your favorite treats and even savory dishes. Imagine incorporating it into a Chocolate Peanut Butter Fruit Dip for a light and flavorful snack, whipping up a batch of No Bake Peanut Butter Cornflake Cookies for a quick dessert, or adding depth to a Chocolate Peanut Butter Pudding Cake or indulgent Chocolate Peanut Butter Dream Bars. The possibilities are truly endless, offering all the rich flavor of peanut butter without the added fats.

Essential Ingredients for Your Upside-Down Banana Cake
Crafting this incredible cake requires a thoughtful selection of ingredients, each playing a crucial role in achieving its perfect flavor and texture. Here’s a detailed look at what you’ll need:
For the Caramelized Banana Topping:
- Butter: Provides richness and forms the base of our luscious caramel glaze.
- Light Brown Sugar: Creates a deep, molasses-rich caramel flavor when melted with butter, perfectly complementing the bananas.
- Bananas: Ripe, firm bananas are ideal for slicing and arranging. They soften beautifully during baking, infusing the cake with natural sweetness and moisture.
For the Peanut Butter Banana Cake Batter:
- Unsalted Butter (room temperature): Essential for a tender cake crumb. Room temperature butter creams beautifully with sugar, incorporating air for a light texture.
- Granulated Sugar: Sweetens the cake and helps create a fine, even crumb.
- Egg and an Egg Yolk: The whole egg adds structure and richness, while the extra egg yolk contributes to a more tender, moist, and flavorful crumb.
- Pure Vanilla Extract: A crucial flavor enhancer that complements both the banana and peanut butter.
- Cake Flour: This low-protein flour is key to achieving a remarkably soft and delicate cake texture. Don’t have it on hand? No worries! You can easily make your own at home by combining all-purpose flour with a bit of cornstarch.
- PB2 Organic Powdered Peanut Butter: The star ingredient! It provides an intense peanut butter flavor without the excess fat and oil of traditional peanut butter, keeping the cake light and flavorful.
- Baking Soda and Baking Powder: These leavening agents work together with the buttermilk to give the cake its beautiful rise and airy texture.
- Salt: Balances the sweetness and enhances all the other flavors in the cake.
- Buttermilk: Adds incredible moisture, tenderness, and a slight tangy note to the cake, reacting with the leavening agents for a perfect rise.

Baking Your Perfect Peanut Butter Upside-Down Banana Cake: Step-by-Step
Creating this stunning cake is a rewarding process. Follow these detailed instructions to ensure a perfectly baked, show-stopping dessert:
- Prepare Your Oven and Pan: Preheat your oven to 350°F (175°C). Generously grease and flour a 10-cup Bundt pan. This step is crucial for preventing the cake from sticking and ensuring a clean release.
- Craft the Caramel Topping: In a small saucepan, combine the ¼ cup of butter and light brown sugar. Whisk continuously over medium heat until the butter melts and the sugar dissolves, bringing the mixture to a gentle boil. Continue to boil for about 30 seconds, allowing the flavors to meld and the glaze to thicken slightly.
- Assemble the Topping: Carefully pour the hot brown sugar mixture into your prepared Bundt pan. Slowly tilt and rotate the pan to ensure the glaze evenly coats the bottom. Arrange your sliced banana pieces decoratively on top of the glaze. You can create a beautiful pattern or simply lay them in an overlapping circle.
- Sift Dry Ingredients: In a medium-sized bowl, sift together the cake flour, PB2 Organic Powdered Peanut Butter, baking soda, baking powder, and salt. Sifting helps to remove any lumps and evenly distribute the leavening agents, ensuring a uniform texture in your cake.
- Cream Wet Ingredients: In a large mixing bowl, using an electric mixer, cream together the softened ½ cup butter and granulated sugar until the mixture is light, fluffy, and pale in color. This process incorporates air, contributing to the cake’s tender crumb. Beat in the vanilla extract, followed by the egg and then the extra egg yolk, mixing well after each addition until fully incorporated.
- Combine Wet and Dry: With your mixer running on low speed, gradually add about half of the sifted dry ingredients to the butter mixture, mixing until just combined. Then, pour in half of the buttermilk and mix briefly. Repeat this process with the remaining dry ingredients and the remaining buttermilk, mixing until the batter is just smooth. Be careful not to overmix, as this can lead to a tough cake.
- Fill the Pan: Gently spoon the cake batter over the banana slices in the Bundt pan. Take care not to disturb the banana arrangement. Spread the batter evenly with a spatula, ensuring it’s distributed uniformly around the pan.
- Bake to Perfection: Transfer the Bundt pan to the preheated oven. Bake for 45-55 minutes, or until a wooden skewer or cake tester inserted into the center of the cake comes out clean. Baking times can vary, so start checking around the 45-minute mark.
- Cool and Invert: Once baked, remove the cake from the oven and let it cool in the pan on a wire rack for approximately 45 minutes. This cooling period is crucial, as it allows the caramelized topping to set and prevents the cake from breaking when inverted. After 45 minutes, carefully place a serving plate over the Bundt pan and, using oven mitts, confidently invert the cake onto the plate. The beautiful banana topping should now be on top!
- Serve and Enjoy: Allow the cake to cool slightly more, or serve it warm. It’s absolutely divine on its own, but truly shines when accompanied by a dollop of stabilized whipped cream, freshly whipped cream, or a scoop of your favorite vanilla ice cream.

Tips for Success and Variations
To ensure your Peanut Butter Upside-Down Banana Cake turns out perfectly every time, keep these tips in mind:
- Use Ripe, Firm Bananas: While you want ripe bananas for flavor, ensure they are still firm enough to slice neatly and hold their shape during baking. Overly mushy bananas might disintegrate.
- Grease and Flour Thoroughly: A well-prepared Bundt pan is key to a clean release. Don’t skimp on butter and flour (or use a baking spray with flour).
- Don’t Rush the Cooling: Allowing the cake to cool in the pan for the recommended 45 minutes is vital. This allows the caramel to set and prevents the cake from falling apart when inverted.
- Avoid Overmixing: Overmixing the batter can develop the gluten in the flour, leading to a tough cake. Mix until just combined.
Delicious Variations:
- Add Chocolate Chips: Fold half a cup of mini chocolate chips into the cake batter for a peanut butter-banana-chocolate triple threat.
- Nutty Topping: Sprinkle chopped peanuts or pecans over the banana slices before pouring in the batter for added crunch.
- Spiced Cake: Add a pinch of cinnamon or nutmeg to the dry ingredients for a subtle warmth.
- Cream Cheese Glaze: Instead of whipped cream, drizzle a simple cream cheese glaze over the cooled cake for an extra layer of decadence.
PB2: Not Just for Humans!
Here’s a fun fact about PB2 Organic Powdered Peanut Butter: it’s not just a fantastic ingredient for human treats! Our beloved furry friends can also safely enjoy its deliciousness. Unlike some conventional peanut butter brands that contain xylitol (a sugar substitute that is toxic to dogs), PB2 products are xylitol-free. This makes them a safe and healthy option for spoiling your pups. You can even use PB2 to whip up some homemade treats like these Homemade Dog Pill Pockets or delightful Peanut Butter & Oatmeal Dog Biscuits. Our four-legged companions adore peanut butter just as much as we do!
You can easily find PB2 Powdered Peanut Butter products at your favorite local grocery store, or for ultimate convenience, order them directly online!

Peanut Butter Upside-Down Banana Cake
Created by: Lynne Feifer
Course: Dessert
Cuisine: American
Prep Time: 20 minutes
Cook Time: 55 minutes
Total Time: 1 hour 15 minutes
Servings: 16 people
This Peanut Butter Upside-Down Banana Cake made with PB2 Organic Powdered Peanut Butter is topped with sliced bananas in a brown sugar glaze. Serve with a dollop of stabilized whipped cream and you’ve got a dessert the whole family will enjoy all year long!
Equipment
- Small saucepan
- Mixer (stand or hand)
- Bundt pan
Ingredients
For the Topping:
- ¼ cup butter
- ½ cup packed light brown sugar
- 1 banana, sliced
For the Cake:
- ½ cup butter, room temperature
- 1 cup sugar
- 1 egg
- 1 egg yolk
- 1 ½ teaspoons pure vanilla extract
- 1 ½ cups cake flour
- ¾ cup PB2 Organic Powdered Peanut Butter
- 1 teaspoon baking soda
- ½ teaspoon baking powder
- ½ teaspoon salt
- 1 ⅓ cups buttermilk
Instructions
- Preheat oven to 350° F (175°C), and generously grease and flour a Bundt pan.
- In a small saucepan, combine the ¼ cup of butter and brown sugar over medium heat, whisking constantly as it comes to a boil. Then boil for about 30 seconds.
- Slowly turn the Bundt pan as you pour the sugar mixture into it to evenly distribute. Place the banana slices on top of the sugar mixture in a decorative line around the pan.
- Over a medium bowl, sift together the flour, PB2 Organic Powdered Peanut Butter, baking soda, baking powder, and salt.
- In a mixing bowl, cream together the ½ cup butter and 1 cup sugar until light and fluffy. Add the vanilla, egg, and egg yolk and mix well until fully incorporated.
- Add half of the dry ingredients to the butter mixture and mix until just combined. With the mixer running on low, pour in half of the buttermilk, then add the remaining dry ingredients, and finally the remaining buttermilk. Mix until combined, being careful not to overmix.
- Gently pour the cake batter into the Bundt pan, taking care not to displace the bananas. Spread the batter evenly to ensure it is uniformly distributed.
- Bake for 45-55 minutes or until a cake tester inserted into the middle comes out clean.
- Allow the cake to cool in the pan on a wire rack for about 45 minutes before placing a plate over the pan and inverting it.
- Serve with my stabilized whipped cream or fresh whipped cream, if desired.
Nutrition
Serving: 1g | Calories: 238kcal | Carbohydrates: 32g | Protein: 5g | Fat: 11g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 1g | Cholesterol: 48mg | Sodium: 280mg | Potassium: 95mg | Fiber: 1g | Sugar: 22g | Vitamin A: 354IU | Vitamin C: 1mg | Calcium: 46mg | Iron: 1mg
Once you’ve experienced the pure joy of this Peanut Butter Upside-Down Banana Cake, don’t forget to share your creation!
Did you make this recipe?
Share it with me on Instagram and make sure to follow me on Pinterest for more delicious recipes and baking inspiration.
~ FOLLOW ME FOR MORE DELICIOUS RECIPES AND BAKING TIPS ~
~ FACEBOOK ~ PINTEREST ~
~ INSTAGRAM ~ TWITTER ~
SIGN UP FOR THE WEEKLY
365 DAYS OF BAKING & MORE
NEWSLETTER BELOW!
JOIN THE365 DAYS OF BAKING AND MORE FACEBOOK GROUPTO RECEIVE ADVANCE NOTICE OF MY LIVE FB VIDEOS,SHARE RECIPES AND MORE!