Peanut Butter Banana Bundt Cake
Peanut Butter Banana Bundt Cake is a moist, nutty, and tender loaf style cake with rich peanut butter notes and ripe banana sweetness. This easy to make Bundt combines simple pantry ingredients into a comforting dessert that looks elegant yet is forgiving to mix. Perfect for weekend brunches or casual gatherings, it's an approachable treat you'll return to time and again.
Equipment
- Large Bowl
- Medium Bowl
- Whisk
- 10 cup Bundt pan
- Wire Rack
- Instant read thermometer
Ingredients
- 1 cup (200 grams) granulated sugar Sweeten the cake batter and help tenderize the crumb while promoting even browning during baking; granulated sugar also dissolves to assist with moisture retention and structure when creamed with fats and liquids.
- 3/4 cup (168 grams) neutral oil Provide a neutral-flavored fat that contributes richness and moistness to the cake without adding additional flavor notes; oil also helps maintain a tender, soft crumb and improves shelf life by keeping the cake moist.
- 3/4 cup (185 grams) mashed very ripe banana (about 2 medium bananas) Add concentrated banana flavor and natural sweetness while contributing moisture and a soft texture; mashed very ripe banana also reacts with leaveners to enhance tenderness and provides subtle fruit aroma.
- 1/2 cup (110 grams) firmly packed light brown sugar Bring deep, caramel-like sweetness and extra moisture, enriching the cake's flavor and contributing to a chewier crumb; firmly packed light brown sugar also supplies a hint of molasses that complements the peanut butter and banana.
- 1/2 cup (128 grams) creamy peanut butter Introduce creamy peanut flavor and a dense, rich texture while adding fat and emulsifying properties that help bind the batter; peanut butter also reinforces the cake's nutty profile and contributes to moistness.
- 2 large eggs (150 grams), room temperature Incorporate structure and lift by providing proteins that set during baking; eggs also contribute moisture, richness, and emulsification for a cohesive, tender crumb when beaten with sugars and fats.
- 2 teaspoons (8 grams) vanilla extract Impart aromatic sweetness and roundness to the flavor profile, enhancing the banana and peanut butter notes; vanilla extract also helps balance and unify the overall taste of the cake.
- 1 cup (240 grams) whole buttermilk, room temperature Add tangy moisture and acidity that reacts with leaveners to produce a lighter, more tender crumb; whole buttermilk also contributes richness and a subtle tang that complements the banana and peanut flavors.
- 2 1/2 cups (313 grams) all-purpose flour Form the cake's structure by supplying gluten and starch that set during baking; all-purpose flour also balances hydration and works with leaveners to create proper rise and crumb texture.
- 1 teaspoon (5 grams) baking powder Act as a chemical leavening agent to produce carbon dioxide, helping the cake rise and develop a light crumb; baking powder also helps balance acidity from buttermilk for even lift.
- 1 teaspoon (3 grams) kosher salt Enhance overall flavor and control yeast/bacterial growth by contributing salinity; kosher salt also strengthens gluten structure slightly and balances sweetness in the finished cake.
- 1/4 teaspoon (1.25 grams) baking soda Provide additional leavening that reacts with acidic buttermilk to release carbon dioxide, aiding rise and crumb tenderness; smaller quantity ensures proper balance with the baking powder.
- Chocolate Glaze recipe follows Supply a glossy, sweet finish when prepared as a glaze to complement the cake; chocolate glaze adds rich chocolate flavor, sheen, and a contrasting texture to the moist bundt cake.
Instructions
- Preheat oven to 325°F (170°C).: As the oven warms you will smell a neutral warmth, and preheating ensures the cake rises evenly from the moment it goes in. This temperature gives the Bundt enough time to bake through without overbrowning. A common error is skipping preheat, which leads to uneven texture, so always wait until your oven reaches the set temperature.
- In a large bowl, whisk together granulated sugar, oil, banana, brown sugar, and peanut butter until well combined, about 1 minute. Add eggs and vanilla, and whisk until well combined. Whisk in buttermilk.: You will notice the mixture becoming glossy and uniform, with the peanut butter dispersing through the sweet base; the aroma becomes richer and slightly toasty. This step helps emulsify fats and liquids so your batter holds air for a tender crumb. Overmixing beyond this point can create excess gluten, so stop once smooth.
- In a medium bowl, whisk together flour, baking powder, salt, and baking soda. Gradually whisk flour mixture into sugar mixture until just combined, stopping to scrape sides of bowl. (Do not overmix.): After adding the eggs the mixture will look more cohesive, slightly thicker and silkier, and you may hear a soft whisking sound as it comes together. Eggs bind and add structure while vanilla sharpens the profile. Avoid adding cold eggs straight from the fridge, as they can chill the batter and affect rise.
- Spray a 10-cup Bundt pan with baking spray with flour. Pour batter into prepared pan. Tap pan on a kitchen towel-lined surface 4 to 5 times to settle batter and release any air bubbles.: When you pour in room temperature buttermilk the batter loosens and gains a gentle tang, smelling fresher and more balanced. This acid reacts later with the baking soda to aid lift. If you add cold buttermilk, the batter can seize and not blend smoothly, so bring it to room temperature first.
- Bake until golden brown, a wooden pick inserted near center comes out clean, and an instant-read thermometer inserted near center registers 205°F (96°C), 50 to 55 minutes, covering with foil after 40 minutes of baking to prevent excess browning. Let cool in pan for 15 minutes. Invert cake onto a wire rack, and let cool completely.: Dry ingredients should be pale and powdery, and whisking them aerates the mix so the cake is lighter. This also ensures even distribution of leaveners to avoid tunnels or dense pockets. A common mistake is scooping flour directly with the measuring cup which packs it tight; spoon and level or weigh to prevent a dry, dense cake.
- When ready to serve, spoon Chocolate Glaze on top of cooled cake.: You will see the batter thicken and take on a uniform, slightly glossy finish. The crumb develops when flour absorbs the liquids without overworking. Stir just until you no longer see streaks of flour, because overmixing develops gluten and makes the cake tough.
- Spray a 10-cup Bundt pan with baking spray with flour.: Coating the pan prevents sticking and helps the cake release cleanly, which preserves the decorative shape. I tap the pan gently to spread the spray evenly so no pockets remain. Not preparing the pan well often results in chunks of cake left behind, so be thorough.
- Pour batter into prepared pan.: As the batter flows into the pan you will hear a soft thump and see it level itself slightly; the surface will be glossy and thick. Pouring carefully avoids splattering and keeps the pan edges clean for a neat final presentation. Overfilling will cause spillover, so ensure your pan is the correct size.
- Tap pan on a kitchen towel-lined surface 4 to 5 times to settle batter and release any air bubbles.: The gentle taps will quiet the batter and reveal any remaining air that might form large holes; the surface will smooth slightly. This step helps produce an even crumb and prevents big cavities. Be careful not to slam the pan hard, which can deflate too much air and make the cake heavy.
- Bake until golden brown, a wooden pick inserted near center comes out clean, and an instant-read thermometer inserted near center registers 205°F (96°C), 50 to 55 minutes, covering with foil after 40 minutes of baking to prevent excess browning.: During baking the kitchen fills with a nutty, caramel scent and the top will become golden and set. Using an instant-read thermometer helps ensure the interior is fully cooked without overbaking. If you skip the foil and the top browns too quickly, tent it to avoid a bitter crust.
- Let cool in pan for 15 minutes.: The cake will relax and slightly pull away from the pan walls, releasing steam and stabilizing the crumb; you will notice a softer scent and reduced steam as it cools. This rest prevents the cake from breaking when inverted. Trying to unmold while piping hot is a frequent mistake, causing the cake to crack or stick.
- Invert cake onto a wire rack, and let cool completely.: As you flip the pan the cake should release smoothly with a satisfying sight of an intact silhouette; cooling on a rack prevents condensation underneath which keeps the crust tender. Full cooling is essential if you plan to glaze, because a warm cake will cause the glaze to slide off. Glazing too soon is a common misstep that ruins presentation.
- When ready to serve, spoon Chocolate Glaze on top of cooled cake.: The glossy glaze will pool and highlight the Bundt ridges, adding a shiny contrast and deep chocolate aroma. Applying glaze slowly allows it to settle evenly and fill the crevices. If the glaze is too hot it will melt and run off, so cool it slightly before spooning.
Notes
- Weigh your dry ingredients: Using a scale for the all-purpose flour and sugars ensures you do not accidentally pack too much in the cup, which keeps the crumb tender and consistent.
- Room temperature ingredients: Bring the eggs and buttermilk to room temperature before mixing so the batter emulsifies smoothly and traps air effectively for a better rise.
- Check oven accuracy: Use an oven thermometer to confirm your oven is at 325°F (170°C), because many ovens run hot or cold and that affects baking time and browning.
- Tap to remove air: After filling the Bundt pan, tapping it on a towel helps eliminate large bubbles that can create holes in the final crumb.
- Cooling patience pays off: Let the cake sit for 15 minutes in the pan and then cool completely on a rack before glazing so the topping adheres without melting away.