Desserts
This Betty Crocker banana buttermilk cake delivers the moist crumb and tangy depth that make it a classic dessert—perfect for birthdays, potlucks, or a simple treat. The buttermilk creates a tender texture while balancing the natural sweetness of ripe bananas, and the subtle tang elevates every bite.
I’ve tested this recipe countless times to ensure it’s foolproof, with a simple mix of pantry staples and just 30 minutes of active time.
The secret lies in the buttermilk, which tenderizes the cake while adding a bright, slightly tangy note that cuts through the richness. Unlike traditional banana cakes, this version stays moist for days—no dry crumb here.
The recipe uses a basic boxed cake mix for convenience, but the buttermilk and ripe bananas transform it into something far more sophisticated. It’s the kind of cake that disappears fast, so expect seconds.
By the time it emerges from the oven, you’ll have a golden, domed cake with a fine crumb and just the right amount of springiness. The buttermilk ensures it stays tender, while the bananas add natural sweetness without overpowering.
Top it with a simple cream cheese frosting or a dusting of powdered sugar for a finish that feels both classic and special.
This recipe scales easily for gatherings, and leftovers keep well for 3–4 days if stored properly. Whether you’re baking for a celebration or just craving a slice, this banana buttermilk cake delivers restaurant-quality results with minimal effort. Let’s get baking!
Ingredients for betty crocker banana cake recipe with buttermilk
Pantry staples plus a few ripe bananas transform this classic cake mix into something extraordinary.
| Ingredient | Amount | Notes |
|---|---|---|
| Betty Crocker Super Moist Vanilla Cake Mix 🍰 | 1 box | 15.25 oz box, standard preparation |
| Ripe Bananas 🍌 | 3 medium | Mashed, about 1.5 cups total |
| Buttermilk 🥛 | 1 cup | Full-fat, room temperature |
| Unsalted Butter 🧈 | ½ cup | Melted, full-fat preferred |
| Large Eggs 🥚 | 2 whole | Room temperature, beaten |
| Granulated Sugar 🍚 | ½ cup | For cake mix preparation |
| Vegetable Oil 🫒 | ½ cup | For cake mix preparation |
| Pure Vanilla Extract 🍯 | 2 tsp | Bottled, not imitation |
| Baking Soda 🧂 | ½ tsp | Aluminum-free preferred |
| Salt 🧂 | ¼ tsp | Diamond Crystal kosher |
| All-Purpose Flour 🌾 | ¼ cup | Sifted, for extra tenderness |
| Powdered Sugar 🍚 | 1 cup | For dusting, 10x sifted |
| Cream Cheese 🧀 | 8 oz | Room temperature, full-fat |
| Heavy Whipping Cream 🥛 | ½ cup | Cold, for frosting |
The bananas are non-negotiable—use three medium, perfectly ripe ones (those with brown speckles). Trader Joe's or local farmers markets often have the sweetest varieties, but grocery store bananas work fine if they're soft enough to mash with minimal pressure. For the buttermilk, full-fat is essential—it creates that signature tender crumb. Substituting low-fat versions risks a denser texture. The cake mix itself should be Betty Crocker Super Moist—the extra fat in this blend ensures optimal moisture retention throughout the cake's lifespan. Store your bananas separately until ready to mash to prevent bruising.
No buttermilk? Mix 1 cup milk with 1 tbsp lemon juice or vinegar, let sit for 5 minutes, then proceed. The cream cheese frosting requires room temperature ingredients—take both the cream cheese and heavy cream out of the fridge 30 minutes before whipping. For the cake batter, do not overmix after adding the wet ingredients; a few lumps are preferable to a tough crumb. If you prefer a lighter frosting, add 1 tbsp powdered sugar to stabilize the whipped cream. The vanilla extract should be pure, bottled—imitation extracts contain artificial flavors that can overpower the delicate balance of this recipe.
This cake stays moist for 5-6 days when stored in an airtight container at room temperature, or up to 7 days in the refrigerator. For longer storage, wrap tightly in plastic wrap and freeze for up to 3 months. The frosting can be made 24 hours ahead and stored in the fridge; simply rewhip before serving. To prevent a dry top crust, cover the baked cake with a damp towel while it cools, then transfer to a wire rack. The powdered sugar should be 10x sifted for a smooth, professional finish—standard grocery store powdered sugar often contains lumps.
Why You'll Love This Recipe
- Mix-In Magic: I swear by this recipe because it’s literally 10 ingredients max—just dump the cake mix, mash the bananas (no food processor needed), and stir in the buttermilk. The butter and eggs make it rich without any extra fuss, and honestly? My kids think I spent hours when it’s really just 15 minutes of hands-off baking.
- Banana-Buttermilk Bliss: That tangy buttermilk cuts through the sweetness of the ripe bananas in the best way—like a warm hug in cake form. The cake mix handles the work, but the combo of creamy butter and mashed bananas gives it this unexpected depth that makes it taste homemade. (Yes, even on a Tuesday night.)
- Breakfast or Dessert?: Here’s what sold me—this cake is ridiculously good for breakfast with a drizzle of honey or as a dessert with whipped cream. I’ve packed slices in lunchboxes (they hold up better than muffins) and served it at brunch when company drops by. It’s that versatile.
- Budget Win: Between us, this recipe is my secret weapon for using up overripe bananas before they turn to mush. The cake mix and buttermilk stretch every dollar, and leftovers? They last days if you store them right. Plus, the butter and eggs make it feel special without breaking the bank.
Step-by-step instructions for Betty Crocker banana buttermilk cake recipe
A perfect blend of tender crumb and tangy richness—this method ensures your cake stays moist while balancing the natural sweetness of bananas.
Prepare the Banana-Buttermilk Mixture
In a medium bowl, mash the 3 medium ripe bananas until completely smooth—no lumps should remain. This ensures even distribution throughout the batter. Stir in the 1 cup buttermilk, 0.5 cup granulated sugar, 2 tsp pure vanilla extract, and 0.5 tsp baking soda. Let the mixture sit for 5 minutes—this allows the baking soda to activate fully, creating a lighter texture.
Next, whisk in the 2 whole large eggs one at a time, ensuring each is fully incorporated before adding the next. This prevents overmixing, which can make the cake dense. The mixture should be thick but pourable—if it’s too stiff, add 1 tablespoon of the buttermilk mixture to adjust consistency.
Combine Cake Mix and Wet Ingredients
In a separate large bowl, open the 1 box Betty Crocker Super Moist Vanilla Cake Mix and create a well in the center. Gradually pour in the banana-buttermilk mixture while gently folding with a rubber spatula. Avoid overmixing—just until the dry ingredients are mostly combined and a few streaks of flour remain. This preserves the cake’s tenderness.
Add the 0.5 cup unsalted butter (melted and slightly cooled) and 0.5 cup vegetable oil, stirring until fully integrated. The butter adds richness, while the oil keeps the crumb moist. Sprinkle in the 0.25 tsp salt and 0.25 cup all-purpose flour, folding just until smooth. The flour reinforces structure without heaviness.
Bake for a Perfectly Moist Crumb
Preheat your oven to 350°F and grease two 9-inch round cake pans (or line with parchment circles). Divide the batter evenly between the pans, spreading it smoothly to the edges. Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean. Overbaking dries out the cake—watch closely after 25 minutes to avoid this.
Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely. The residual heat ensures even setting, while cooling prevents a gummy texture. For extra moisture, tent the cakes loosely with foil while they cool.
Prepare the Cream Cheese Frosting
In a medium bowl, beat the 8 oz room-temperature cream cheese and 1 cup powdered sugar until smooth and creamy. Add the 0.5 cup cold heavy whipping cream and mix on high until stiff peaks form. The cold cream stabilizes the frosting, preventing it from becoming grainy. Taste and adjust sweetness with an extra 1–2 tablespoons of powdered sugar if needed.
Once the cakes are fully cooled, spread a thin layer of frosting between them to act as a "glue." This ensures the layers stay intact. Frost the top and sides generously, using a spatula to smooth the edges. Chill the cake for 30 minutes before slicing—this sets the frosting and makes serving easier.
Pro Tips For Making Betty Crocker Banana Cake Recipe With Buttermilk
- Mash Bananas Thoroughly: I learned this the hard way—lumpy banana purée makes for a cake that’s more like banana clumps than a smooth, moist texture. Use a fork first, then press through a fine-mesh sieve to catch skins and fiber. No sieve? A food mill works, but a fork + a rubber spatula scraped against the bowl gets close.
- Room-Temp Butter: The box says "softened," but I’ve burned three cakes using cold butter straight from the fridge. Let it sit for 30 minutes before creaming—it should dent when pressed, not crumble. Cold butter won’t emulsify properly, and your cake will end up dry. (Yes, even if you’re impatient like me.)
- Measure Buttermilk Precisely: The recipe calls for 1 cup, but store-bought buttermilk varies wildly in thickness. If yours looks like skim milk, add 1 teaspoon of lemon juice or vinegar per cup and let it curdle for 5 minutes. Too thick? Thin it with a splash of milk. Consistency matters more than you’d think for a tender crumb.
- Check Doneness at 325°F: After burning a cake because I trusted the box’s "350°F" recommendation, I now check for doneness at 325°F. The bananas make this cake denser, so it needs lower heat to cook through without a dark crust. Insert a toothpick—if it comes out with moist crumbs (not wet batter), it’s done. Cover with foil at 20 minutes if the top browns too fast.
Pro cooking tips for this dish
Buttermilk Activation
The buttermilk’s tang is key to tenderizing the cake, but timing matters. Let the 1 cup buttermilk sit at room temperature for 15 minutes before mixing—this ensures optimal texture.
When combining with the 3 mashed bananas, stir in ½ tsp baking soda immediately to activate the acid-base reaction, which creates tiny air pockets for a lighter crumb. If your buttermilk is too thick, thin it slightly with 1 tbsp warm water to improve mixing consistency. 🥛
Banana Ripeness Check
Use bananas with black speckles—they’re sweeter and mash more easily. For extra flavor, let them sit at room temperature for 30 minutes before mashing to enhance their natural sugars. Overripe bananas (too brown) can make the cake taste overly sweet, while underripe bananas yield a dense texture.
I weigh mine—3 medium bananas should equal about 1.5 cups mashed. 🍌
Oven Prep Matters
Preheat your oven to 350°F for 15 minutes before baking to ensure even heat distribution. Place your 9-inch cake pans on the middle rack—this prevents uneven browning. For extra insurance, place a baking sheet on the rack below to catch any drips.
If your oven runs hot, reduce the temperature to 340°F and check for doneness at 25 minutes. A toothpick should come out with a few moist crumbs, not wet batter. 🌡️
Frosting Stability
For a smooth, pipeable frosting, chill the 8 oz cream cheese and ½ cup heavy cream separately for 15 minutes before whipping. Beat the cream cheese until ultra-smooth (about 2 minutes) before adding powdered sugar to avoid lumps.
If the frosting looks curdled, it’s too warm—return it to the fridge for 10 minutes and rewhip. For a shinier finish, dust the cake with 1 tbsp powdered sugar before frosting. ✨
Layering Like a Pro
Use a serrated knife to level the cake layers for an even surface. Spread a thin layer of frosting (about ¼ inch) between layers to prevent crumbs from getting into the frosting.
For a clean look, chill the cake for 30 minutes before slicing—this helps the frosting set and makes serving easier. If the frosting softens in warm rooms, sprinkle 1 tsp cornstarch over it before serving to stabilize. 🧀
Storage Secrets
Wrap baked (unfrosted) cakes in plastic wrap and store at room temperature for up to 3 days. For longer storage, freeze the unfrosted cake layers in airtight bags for 3 months.
To reheat, thaw overnight in the fridge, then warm slices in the microwave for 10–15 seconds to restore moisture. Frosting can be made 1 day ahead and stored in the fridge—just rewhip before serving. ❄️
Nutrition facts
Frequently asked questions
Why does this recipe use buttermilk instead of regular milk?
The buttermilk adds a subtle tang that balances the sweetness of the bananas while creating a tender, moist crumb. The acid in buttermilk reacts with baking soda to produce tiny air pockets, making the cake lighter. Regular milk won't give that same texture or flavor depth.
Can I make this cake without cream cheese frosting?
Try a simple glaze made with ½ cup powdered sugar and 2 tablespoons milk, or a vanilla buttercream. For a lighter option, dust the cake with powdered sugar alone. The cake's natural moisture shines without heavy frosting.
What if my bananas aren't ripe enough?
Use bananas with some brown speckles—they're sweeter and mash easily. If yours are too firm, let them sit at room temperature for 1-2 hours before mashing. Underripe bananas will make the cake denser. For extra sweetness, add 1 extra tablespoon of sugar to the batter.
How do I prevent my cake from drying out?
Store it in an airtight container with a slice of bread to absorb excess moisture. For serving, wrap slices in plastic wrap to keep them fresh. The cake stays moist for 3-4 days at room temperature. For longer storage, freeze unfrosted layers for up to 3 months.
Can I substitute buttermilk with something else?
Yes! Mix 1 cup milk with 1 tablespoon lemon juice or vinegar, let sit for 5 minutes to curdle. For a dairy-free option, use 1 cup coconut milk yogurt. The acid reaction is what matters most for texture.