This is my ultimate banana layer cake: two fluffy, moist banana cake layers sandwiching a caramelized banana crémeux and finished with a silky honey Swiss meringue buttercream. The combination of creamy filling, tender cake, and light honey buttercream creates a bright, balanced dessert that’s perfect for spring gatherings or special occasions.
Banana Cake — Not Banana Bread
While dense, brown-sugar-rich banana bread has its place, this recipe produces a lighter cake-style crumb that still stays moist. To avoid large banana chunks and create a smooth crumb, I blend the bananas in a food processor until almost liquid. That, combined with the reverse creaming method—mixing the fat into the dry ingredients first—gives tender layers with flat tops and minimal trimming.
For extra banana flavor, a layer of caramelized banana crémeux sits between the layers like a luxurious banana pudding. Instead of cream cheese frosting, I use a honey Swiss meringue buttercream for an elegant, lightly sweet finish. The result is three complementary textures: tender cake, creamy fruit filling, and airy buttercream.
Key Ingredients & Test Notes
- Cake or pastry flour: Use lower-protein flour (about 8–9%) for a delicate, tender crumb. Weigh your flour with a scale for accuracy.
- Ripe bananas: Ripe or slightly overripe bananas give the best banana flavor. Weigh the bananas after slicing or mashing—too much banana can make the cake dense; this recipe was tested with about 300 g of mashed banana.
- Granulated sugar: This recipe uses granulated sugar (no brown sugar) so the banana flavor remains the star without molasses notes. Bananas add natural sweetness, so sugar is reduced compared to many cake recipes.
- Butter and oil: Salted European-style butter gives the best flavor; a small amount of neutral oil (sunflower or vegetable) helps retain moisture.
- Crème fraîche: Adds richness and tenderness; you can substitute plain Greek yogurt or sour cream in equal amounts.
- Eggs: Whole eggs are used in the batter; egg yolks are used in the crémeux and egg whites in the Swiss meringue buttercream. Use room-temperature eggs for best emulsification.
How to Make Banana Layer Cake
- Weigh and place sliced ripe bananas into a food processor.
- Blend the bananas into a smooth puree.
- Add crème fraîche, vanilla, and eggs to the processor.
- Process until smooth, like a thick banana smoothie.
- Rub lemon zest into the granulated sugar to release oils. Whisk together the lemon-scented sugar, flour, baking powder, baking soda, and salt in the mixer bowl.
- On medium-low speed, add softened butter and oil and mix until the dry ingredients resemble wet sand.
- With the mixer on medium-low, slowly pour in half the banana mixture and blend until combined; add the second half and mix until a thick, smooth batter forms.
- Divide the batter evenly between two prepared 8-inch round pans and level with an offset spatula.
- Bake on the middle rack at 350°F (180°C) for about 28–33 minutes, until the top springs back and a toothpick comes out clean. Cool in pans 10 minutes, then invert onto a rack to cool completely.
- Assemble: place one layer upside down, pipe a buttercream ring around the edge to form a dam, fill the center with banana crémeux, then top with the second layer and frost the outside with honey buttercream.
- Pipe any decorative frosting and add edible flowers if desired. The crémeux holds its shape well and can be piped into dollops around the top.
- Finish and chill briefly if needed, then bring to room temperature before serving for the best texture.
Jenn’s Tips
- Read the recipe first: Review the cake, filling, and frosting steps before starting. Each component is straightforward but made separately.
- Make ahead: Break the project into two days for easier assembly. Example schedule:
- Day 1: Make banana crémeux and chill overnight. Bake cakes, cool, wrap, and store.
- Day 2: Make honey buttercream, whip the crémeux until smooth, and assemble.
- Weigh ingredients: Use a kitchen scale for accuracy, including the bananas.
- Piping: Use a wide piping tip for striped frosting or your preferred tip for decoration.
- Serving & storage: The crémeux contains stabilizer and holds at room temperature for service. Refrigerate leftovers in an airtight container for up to five days; bring to room temperature before serving.
Moist Banana Layer Cake with Honey Buttercream
By: Jenn Davis
- Prep: 45 mins
- Cook: 35 mins
- Frosting & Filling Time: 2 hrs
- Total: ~3 hrs 20 mins
- Yield: One two-layer 8-inch cake
Equipment
- Food processor or blender
- Electric stand mixer
- Two 8-inch round cake pans
Ingredients
Banana Cake
- 315 g (2 1/2 cups) cake flour
- 1 tsp baking soda
- 1 tsp baking powder
- 1/2 tsp fine sea salt
- 250 g (1 1/4 cups) granulated sugar
- Zest from one large lemon
- 170 g (3/4 cup) softened salted European-style butter (about 82% butterfat)
- 28 g (2 tbsp) sunflower oil
- 180 g (3/4 cup) crème fraîche (or Greek yogurt/sour cream)
- 300 g mashed ripe bananas (about 3 large)
- 150 g eggs (about 3 large)
- 1.5 tsp vanilla bean paste
Banana Crémeux Filling
- 1 batch banana crémeux (prepare and chill ahead)
Honey Buttercream Frosting
- 1–2 batches honey Swiss meringue buttercream (make an extra batch if you plan to pipe decorations)
Decoration
- Edible flowers (optional)
Instructions
Banana Crémeux
- Make the banana crémeux a day ahead and store it in the refrigerator; bring it back to a pipeable consistency by whipping briefly before assembly.
Banana Cake
- Preheat oven to 350°F (180°C). For convection, reduce temperature by 25°F. Prepare two 8-inch pans with spray and line bottoms with parchment.
- Rub lemon zest into the granulated sugar, then whisk together flour, baking powder, baking soda, and salt.
- Blend bananas, crème fraîche, vanilla, and eggs in a food processor until smooth and milkshake-like.
- In a stand mixer with the paddle attached, add the dry mix and beat in the butter and oil on medium-low until it resembles wet sand (about 2 minutes).
- Slowly pour in half the banana mixture and beat 1 minute, then the remainder until you have a smooth thick batter (1–2 minutes). Scrape the bowl as needed.
- Divide batter between pans, smooth, and bake 28–33 minutes until springy and a toothpick is clean. Cool 10 minutes in pans, then invert onto a rack and cool completely.
- Wrap cooled layers in plastic and store at room temperature for up to a day or chill briefly to firm for easier assembly.
Honey Buttercream
- Make honey Swiss meringue buttercream. Prepare two batches if you want extra for piping decorations.
Assembly
- Place the first layer upside down on the serving plate. Pipe a ring of buttercream near the edge to form a dam, then fill the center with banana crémeux and smooth.
- Top with the second layer (upside down), crumb coat, then finish frosting the sides and top with honey buttercream.
- Pipe additional decorations and garnish with edible flowers. Leftover crémeux can be served with fruit or saved for another use.
Notes
- Flour & substitutions: The recipe was tested with cake flour (about 8% protein). You can swap for all-purpose flour, but results may vary. Crème fraîche can be replaced with Greek yogurt or sour cream in equal amounts.
- Oven: This recipe assumes a conventional oven. For convection, reduce the temperature by 25°F and begin checking earlier.
- Storage: Store the assembled cake in an airtight container. It can sit at room temperature up to 1 day or be refrigerated up to 5 days. Allow it to come to room temperature before serving for optimal texture.
- Weigh your flour: Use the tested weights for best results. The conversion used here is 1 cup flour = 125 g for this recipe.
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