This moist banana cake with cream cheese frosting is an easy 9 x 13-inch dessert that serves about 12–16 people. Made with very ripe bananas, sour cream, and softened butter, it bakes in 30–35 minutes and finishes with a smooth, tangy cream cheese frosting.
Every square is tender, rich, and full of mellow banana flavor, while the frosting adds a cool, lightly tangy contrast. It is the kind of dependable homemade cake that works beautifully for birthdays, potlucks, family dinners, afternoon coffee, or any time you have spotted bananas waiting on the counter.
Jump to RecipeWhy You’ll Love This Recipe
This banana cake has the soft, plush crumb people hope for in a homemade banana dessert. Sour cream gives the batter extra moisture and a gentle richness, while mashed ripe bananas bring deep fruit flavor without requiring any complicated technique.
The 9 x 13-inch pan makes this a practical dessert for sharing. You can cut it into 12 generous squares or 16 smaller portions, making it an especially useful recipe for gatherings where everyone wants a taste.
The cream cheese frosting is equally appealing. It is smooth, sweet, and lightly tangy, with enough vanilla to complement the banana without hiding it. If you enjoy this flavor combination, you may also like our easy banana cake version for another serving idea.
Ingredients You’ll Need
The cake uses familiar pantry ingredients, but each one has an important role. Softened butter helps create a flavorful base, sugar adds sweetness and tenderness, and eggs provide structure so the cake slices neatly once cool.
- Very ripe bananas: Choose heavily spotted or nearly black bananas. Their texture is soft, their flavor is more concentrated, and they contribute more natural sweetness than firm yellow bananas.
- Sour cream: This keeps the crumb moist and adds a mild richness that balances the sweetness of the bananas and frosting.
- All-purpose flour: Measure 2 cups, or 250 g, for consistent results. If measuring by volume, spoon the flour into the cup and level it rather than packing it down.
- Baking soda and salt: Baking soda supports the cake’s rise, while salt sharpens the flavors.
- Cream cheese and butter: Both must be softened for a smooth frosting. Cold ingredients can leave small lumps and make the frosting harder to spread.
- Powdered sugar: Add it gradually so the frosting stays smooth and does not become dusty or difficult to blend.
For another cream cheese dessert with a seasonal profile, you can browse these pumpkin bars with cream cheese frosting. They are a lovely choice when you want a spiced alternative to banana cake.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then prepare a 9 x 13-inch baking pan with grease. Lining the bottom with parchment is optional, but it can make lifting and serving the cooled cake easier.
Step 2: Place the softened butter and granulated sugar in a large mixing bowl and beat until the mixture looks light and fluffy. This step helps distribute the sugar through the butter and gives the finished cake a lighter texture.
Step 3: Beat in the eggs one at a time, allowing each egg to blend before adding the next. Mix in the vanilla extract and sour cream until the wet mixture looks evenly combined.
Step 4: In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Breaking up any small pockets of baking soda now helps the leavening distribute evenly through the batter.
Step 5: Add the dry ingredients to the wet mixture and stir only until no obvious streaks of flour remain. Do not keep mixing to make the batter perfectly smooth, because overmixing can produce a dense or rubbery cake.
Step 6: Fold in 1 cup of mashed very ripe bananas using a spatula or wooden spoon. Fold gently and stop as soon as the bananas are dispersed throughout the batter.
Step 7: Scrape the batter into the prepared pan and spread it evenly into the corners. A level surface helps the cake bake consistently from edge to center.
Step 8: Bake for approximately 30–35 minutes. The cake is ready when the center is set and a toothpick inserted there comes out with a few moist crumbs rather than wet batter.
Step 9: Let the cake cool completely before adding frosting. If you need to speed up the process, some bakers place the freshly baked cake in the freezer for about 30–45 minutes to cool it rapidly and help retain moisture.
Step 10: For the frosting, beat the softened cream cheese and butter until smooth and creamy. Gradually beat in the powdered sugar, then mix in the vanilla extract until the frosting is spreadable.
Step 11: Spread the frosting over the completely cooled cake in an even layer. Refrigerate the cake briefly if you prefer firmer frosting, then cut it into squares and serve.
Pro Tips for the Best Banana Cake
The bananas are the foundation of this recipe, so do not rush them. Bananas with heavy brown spots or nearly black peels are ideal, even if they look too soft for snacking. Their strong banana flavor carries through after baking and gives the cake its characteristic moisture.
Keep the butter, eggs, sour cream, cream cheese, and frosting butter at the proper softened stage. Butter should give slightly when pressed but should not be melted or oily. Soft ingredients blend more evenly and help prevent a lumpy frosting.
Mixing matters just as much as measuring. Once flour enters the bowl, use a gentle hand and stop as soon as the batter comes together. A few small streaks can disappear while you fold in the bananas, but prolonged stirring can make the crumb heavy.
- Use a light-colored baking pan if possible for even browning.
- Begin checking the cake near the 30-minute mark, since ovens and pans can vary.
- Let the cake cool fully before frosting so the cream cheese mixture does not soften excessively.
- For clean slices, use a sharp knife and wipe the blade between cuts.
If you love banana and cream cheese together but want a chilled dessert, try this no-bake banana cream cheesecake for a different texture and presentation.
Frosting, Serving, and Decorating Ideas
The frosting can be spread in a smooth layer or swirled with the back of a spoon for a casual homemade finish. Because the cake is baked in one pan, there is no need to split layers or assemble a tall dessert.
Serve the squares cold or let them stand at room temperature briefly before eating. Chilling firms the frosting and makes the cake especially refreshing, while a short rest on the counter brings out a softer crumb.
For decoration, keep things simple with a few thin banana slices added just before serving. You can also scatter a small amount of finely chopped nuts over the top if your guests enjoy crunch, though the base recipe is complete without any additions.
For more small treats built around cream cheese, these pumpkin spice cream cheese donut holes make a fun companion for a dessert table. They offer warm spice and bite-size portions alongside the soft banana squares.
Storage and Make-Ahead Advice
Because the frosting contains cream cheese, cover the cake and refrigerate it for storage. It is best enjoyed within several days while the crumb remains moist and the frosting tastes fresh.
You can bake the cake ahead, cool it completely, and frost it later. Keep the unfrosted cake well covered so it does not dry out, then prepare and spread the frosting once you are ready to serve.
For gatherings, frost the entire cake and chill it before cutting. Transport it in the baking pan or a covered container, keeping it level so the frosting remains neat. If you are assembling a varied dessert tray, these blueberry cream cheese roll-ups add a fruity, crisp contrast to the tender cake.
My Favorite Moist Banana Cake With Cream Cheese Frosting
Ingredients
Method
- Heat the oven to 350°F (175°C). Grease a 9 x 13-inch baking pan and line the bottom with parchment if desired.
- Cream the softened butter and granulated sugar until light and fluffy. Beat in the eggs one at a time, then mix in the vanilla and sour cream.
- Whisk the flour, baking soda, and salt together in a separate bowl. Add the dry mixture to the wet mixture and stir just until combined.
- Fold in the mashed bananas without overmixing. Spread the batter evenly in the prepared pan.
- Bake for approximately 30–35 minutes, until the center is set and a toothpick inserted in the middle comes out with a few moist crumbs.
- Cool the cake completely before frosting. For faster cooling, place the freshly baked cake in the freezer for about 30–45 minutes.
- Beat the softened cream cheese and butter until smooth. Gradually add the powdered sugar, then beat in the vanilla.
- Spread the frosting over the cooled cake. Refrigerate briefly if you prefer a firmer frosting, then slice and serve.
Notes
Final Thoughts
My favorite moist banana cake with cream cheese frosting is simple to prepare, generous enough for a crowd, and wonderfully forgiving when made with very ripe bananas. The sour cream keeps every bite tender, while the creamy frosting provides just the right sweet-tangy finish.
For the best results, use bananas with plenty of dark speckles, measure the flour carefully, and stop mixing as soon as the batter comes together. Cool the cake fully before frosting, chill it for a firmer finish if desired, and enjoy each soft, banana-filled square with coffee, tea, or a glass of cold milk.