5 Banana Cake Recipe: Moist Layers With Walnut-Crusted Top

This 5 banana cake recipe delivers the perfect balance of moist, tender layers and a crunchy walnut-studded top that keeps every slice irresistible. 💛 The secret lies in blending ripe bananas with just the right amount of flour and butter, creating a cake that stays soft for days without drying out. I've baked this version countless times for gatherings—it's the one people always ask for seconds on.

The walnut crust isn't just for decoration; it adds a satisfying texture contrast that elevates the cake from simple to special. You'll start with a basic cake batter, then press a mixture of crushed walnuts and melted butter into the top before baking. This technique ensures the crust stays crisp while keeping the interior wonderfully moist—no one will guess it's a healthier alternative to traditional banana bread.

What makes this recipe truly foolproof is the combination of baking powder and baking soda working together to create lift without making the cake too dense. The result? A cake that's light enough to eat without feeling heavy, yet rich enough to satisfy any banana craving. Each slice offers that perfect balance of sweetness from the bananas and subtle nuttiness from the walnuts.

Perfect for breakfast, dessert, or even a snack, this cake pairs beautifully with a dollop of whipped cream or a drizzle of caramel sauce. The recipe scales easily, so you can adjust the number of bananas based on how many servings you need. Let's get baking—this cake is a crowd-pleaser that never disappoints.

Ingredients for 5 banana cake

These 12 ingredients create the perfect balance of moist banana cake with a crunchy walnut top—every bite is pure comfort!

The bananas are everything here. Look for bananas with brown spots—that's where the sweetness hides! I always grab Chiquita or Dole at the store, but any ripe bananas work. The walnuts? Trader Joe's has the best price for bulk, but any store's walnuts will do—just toast them first. That extra step makes all the difference. The butter? Full-fat is non-negotiable—it keeps the cake tender and rich. If you're using salted butter, cut the added salt in half.

No ripe bananas? Use 1/2 cup applesauce per banana—it keeps the moisture but adds a subtle apple flavor. Short on walnuts? Pecans or almonds work too, though walnuts give that classic crunch. The milk can be swapped for almond or oat milk if you're avoiding dairy, but regular milk keeps it classic. For extra richness, add 1/4 cup sour cream to the batter. And if you're worried about the cake being too dense, whisk the eggs until frothy before mixing—they'll add air and lightness.

This cake keeps beautifully—3-4 days in an airtight container at room temperature, or 1 week in the fridge. For the walnut topping, press it firmly into the batter before baking so it doesn't slide off. If you make it ahead, wrap tightly in parchment and freeze for up to 3 months. The flavor actually improves after a day or two as the bananas mellow out. Perfect for meal prep—slice and freeze individual portions for quick grab-and-go treats!

Step-by-step instructions for 5 banana cake recipe

Here's how to create layers of banana bliss with a walnut-crusted crown—no dry crumb in sight!

Start by mashing the 5 whole ripe bananas in a large mixing bowl until completely smooth—no lumps allowed. This is your moisture foundation, so take your time. In a separate microwave-safe bowl, melt the 1 cup unsalted butter in 30-second bursts, stirring between each, until fully liquid. Let it cool slightly before adding to the bananas.

In the same bowl with the mashed bananas, whisk in the melted butter, 1.5 cups granulated sugar, 2 whole large eggs, 1 tbsp vanilla extract, 1 cup milk, and 1 tsp cinnamon. Mix until everything is fully combined and smooth. The batter should be thick but pourable—this ensures that moist texture we're after. I like to give it a quick taste here to adjust sweetness if needed, but the sugar amount is spot-on for ripe bananas.

In a medium bowl, sift together the 2.5 cups all-purpose flour, 1.5 tsp baking powder, 0.5 tsp baking soda, and 0.5 tsp salt. This sifting step is crucial—it prevents dense layers and ensures lightness. Gently fold the dry ingredients into the wet mixture using a spatula, mixing just until combined. Be careful not to overmix—you should still see some flour streaks. Overmixing develops gluten, which can make your cake tough.

Now, fold in the 1.5 cups chopped walnuts. I like to toast them first in a dry skillet over medium heat for 3-4 minutes until fragrant, then chop them while still warm. This adds incredible flavor and texture contrast to the soft cake layers. The walnuts should be evenly distributed throughout the batter.

While you're working with the cake batter, prepare the walnut topping. In a small bowl, mix together ½ cup of the chopped walnuts with 2 tablespoons of the granulated sugar and 1 tablespoon of melted butter. This creates a sweet, crunchy crust that will crown your cake beautifully. Set this mixture aside—it'll be our finishing touch.

This step is what makes this cake truly special. The walnut crust adds a textural contrast that balances the soft, moist layers beneath. Don't skip it—it's what gives this recipe its signature appeal. If you want extra crunch, you can toast the walnuts longer or add a sprinkle of cinnamon to the topping mixture.

Preheat your oven to 350°F and grease two 9-inch round cake pans or one 9x13-inch pan (for a single layer cake). Divide the batter evenly between the prepared pans. For the walnut topping, sprinkle the reserved walnut mixture evenly over each layer of batter. If using round pans, you can create a decorative pattern with the walnuts for extra visual appeal.

Bake for 30-35 minutes for round pans or 35-40 minutes for a single layer cake, until a toothpick inserted into the center comes out clean. The edges should be golden brown, and the top should spring back gently when touched. Real talk: your oven might run hot or cold, so start checking at the 25-minute mark for round pans or 30-minute mark for the sheet pan. The walnut topping should be golden but not burnt.

Allow the cakes to cool in their pans for 10 minutes, then transfer to a wire rack to cool completely. This cooling step is crucial—it prevents the cakes from becoming gummy in the center while they're still hot. For a layered cake, place a piece of parchment paper between the layers to keep them separate while cooling.

Once completely cool, you can assemble your cake with a thin layer of banana buttercream (made from leftover mashed bananas mixed with softened butter) if desired. The walnut topping will keep its crunch even after assembly, providing that perfect textural contrast with every bite. Slice into 12 perfect servings—each one packed with moist banana flavor and crunchy walnut goodness.

Essential equipment for perfect results

Mixing Essentials

Start with a stand mixer or hand mixer to combine the wet ingredients—it's the easiest way to get that smooth batter. I use my KitchenAid Artisan Series with the paddle attachment for this recipe, but a hand mixer works perfectly too. The key is to avoid overmixing once you add the flour, so keep the speed on medium-low after that. 🥣

Measuring Tools

Invest in a good set of measuring cups and spoons—this isn't the place to skimp. I love the OXO Good Grips set because the markings are clear and the handles stay cool. For the flour, use the spoon-and-level method to avoid packing it down, which can make your cake dense. A digital kitchen scale is ideal if you want precision, especially for the flour and sugar.

Baking Pans

For the classic two-layer look, grab two 9-inch round cake pans with removable bottoms—they make it easier to release the cake without sticking. If you're making a single-layer cake, a 9x13-inch baking pan works great. Always grease the pans thoroughly with butter or baking spray and line the bottoms with parchment paper for extra insurance. I use Wilton Non-Stick Baking Spray for a foolproof release every time.

Mixing Bowls

A large mixing bowl (at least 5-quart capacity) is a must for combining the wet ingredients, and a medium bowl (about 3-quart) works for the dry ingredients. I prefer stainless steel bowls because they're durable and easy to clean, but glass bowls are great if you like seeing the batter's texture. Just make sure they're scratch-free—rough surfaces can harbor bacteria.

Crust Prep Tools

For the walnut topping, a small mixing bowl (about 1-quart) is perfect for combining the walnuts, sugar, and butter. A spatula helps spread the topping evenly over the batter, and a fine-mesh sieve can help distribute the walnuts in decorative patterns if you're feeling fancy. I also keep a small offset spatula handy for pressing the topping firmly into the batter before baking.

Cooling Essentials

Let your cake cool in the pans for 10 minutes before transferring to a wire cooling rack—this prevents the cakes from collapsing. If you're making a layered cake, grab a long serrated knife for leveling the layers and parchment paper to separate them while cooling. A parchment-lined cake board makes assembly and serving a breeze, especially if you're adding frosting later. 💛

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