Ultra-moist Banana Walnut Cake with cream cheese frosting delivers perfect crunch from toasted walnuts and max flavor from overripe bananas. This easy recipe serves 12-16, freezes beautifully, and turns ripe banana bounty into bakery perfection.
This cake solves the overripe banana puzzle with tender crumb, nutty crunch, and tangy frosting that home bakers crave for birthdays, potlucks, or cozy tea time. Prep takes just 20 minutes before baking, and simple swaps keep it foolproof for beginners or busy days.
Why You’ll Love This Banana Walnut Cake
Picture sinking your fork into ultra-moist layers packed with toasted walnut chunks and natural banana sweetness, all crowned by fluffy cream cheese frosting. Unlike basic banana bread, this cake rises tall, frosts beautifully, and stays fresh for days thanks to sour cream and buttermilk magic. Readers rave about its crowd-pleasing texture contrast and how it uses up 4 spotted bananas effortlessly. Serve it plain, layered, or bundt-style for any occasion.
Ingredients
For the Cake
- 4 large overripe bananas (about 1 1/2 cups mashed)
- 3 cups all-purpose flour (spooned and leveled)
- 1 1/2 teaspoons baking soda
- 1 teaspoon ground cinnamon
- 1/2 teaspoon salt
- 10 tablespoons unsalted butter, softened
- 3/4 cup granulated sugar
- 3/4 cup packed light brown sugar
- 3 large eggs, room temperature
- 2 teaspoons pure vanilla extract
- 1 cup sour cream, room temperature
- 1/2 cup buttermilk, room temperature
- 1 cup walnuts, chopped and toasted
For the Cream Cheese Frosting
- 8 ounces full-fat cream cheese, softened
- 1/2 cup unsalted butter, softened
- 3 cups powdered sugar, sifted
- 1 teaspoon pure vanilla extract
- Pinch of salt
- 1/2 cup chopped toasted walnuts, for garnish
Quick Notes on Key Ingredients
Overripe bananas (black spots ideal) mash easily and pack sweetness that reduces added sugar. Toast walnuts at 350°F for 5-7 minutes to amplify nutty depth without bitterness. Room-temperature dairy ensures even mixing and rise.
How to Make Moist Banana Walnut Cake
- Preheat and Prep: Set oven to 350°F (177°C). Grease a 9×13-inch pan, or two 8-inch round pans for layers, or a bundt pan. Line with parchment for easy release.
- Mash Bananas: Peel and mash bananas with a fork until smooth with some chunks for texture. Set aside.
- Mix Dry Ingredients: Whisk flour, baking soda, cinnamon, and salt in a medium bowl.
- Cream Butter and Sugars: Beat butter, granulated sugar, and brown sugar on medium-high until pale and fluffy, about 3 minutes. Add eggs one at a time, beating well after each. Mix in vanilla.
- Combine Wet and Dry: Add mashed bananas to the butter mixture. On low speed, alternate adding dry ingredients and sour cream/buttermilk (start and end with dry). Mix just until combined, about 30 seconds. Fold in chopped walnuts gently to avoid toughness.
- Bake: Pour batter evenly into pan(s). For 9×13, bake 35-40 minutes; 8-inch layers 25-30 minutes; bundt 50-60 minutes. Toothpick in center should come out clean or with moist crumbs. Cool in pan 10 minutes, then fully on wire rack.
- Make Frosting: Beat cream cheese and butter until smooth. Gradually add powdered sugar, vanilla, and salt. Beat on high until fluffy, 2 minutes.
- Frost and Serve: For sheet cake, spread frosting evenly and sprinkle walnuts. For layers, level cakes, add crumb coat, chill 30 minutes, then frost fully. Garnish with walnuts.
Pro Baking Tips
- Weigh flour (360g) for precision; too much dries it out.
- Don’t overmix batter; gluten makes it tough.
- Test ripeness: Bananas should smell sweet and yield to gentle pressure.
- For extra moisture, tent foil loosely after 25 minutes if tops brown fast.
Complete Recipe Card
Moist Banana Walnut Cake
Ultra-moist cake with toasted walnuts and cream cheese frosting, perfect for using overripe bananas.
Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 3 hours (includes cooling)
Servings: 12-16
Yield: One 9×13 cake
Ingredients (see full list above)
Instructions (numbered as above)
Nutrition (per slice, 16 servings, estimated)
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calories | 450 | 23% |
| Total Fat | 25g | 32% |
| Carbohydrates | 50g | 18% |
| Protein | 6g | 12% |
| Fiber | 2g | 7% |
Delicious Variations
Customize for your crowd:
- Layer Cake: Bake in 2×8-inch pans; stack 3-4 high with thin frosting layers.
- Gluten-Free: Swap 1:1 gluten-free flour blend.
- Nut-Free: Use chocolate chips or pecans.
- Bundt Version: Dust with cinnamon sugar post-bake for shine.
- Cupcakes: Fill 24 liners, bake 20 minutes; frost generously.
Storage and Freezing
Store frosted cake covered at room temp up to 2 days, or fridge up to 5 days (bring to room temp before serving).
Unfrosted layers freeze airtight up to 2 months; thaw overnight, then frost. Travel tip: Use a sturdy carrier with cake board for stability.
Serving Suggestions
Pair slices with vanilla ice cream, strong coffee, or whipped cream for dessert. For brunches, dust with powdered sugar and add yogurt dip. Holidays? Stack mini versions on a platter.
| Pairing Idea | Why It Works |
|---|---|
| Coffee | Cuts richness |
| Ice Cream | Chills moist crumb |
| Yogurt Dip | Breakfast twist |
Frequently Asked Questions
How ripe should bananas be for this cake?
Very ripe with black spots; they mash easily and sweeten naturally for ultimate moisture.
Can I make this vegan?
Yes: Use plant-based butter, flax eggs (1 Tbsp flax + 3 Tbsp water each), vegan sour cream, and almond milk.
Why sour cream?
It tenderizes crumb and adds tang that balances banana sweetness.
Vs banana bread?
Taller, frostable cake with more walnuts for crunch; bread is denser/loaf-shaped.
Can I add browned butter?
Absolutely: Brown 10 Tbsp butter first for nuttier depth; cool fully before creaming.
Nutritional info accurate?
Estimates based on full-fat ingredients; use a calculator for your tweaks.
This Moist Banana Walnut Cake brings bakery joy to your kitchen with every tender, crunchy bite. Pin it for banana season, drop a 5-star rating if it wows your crowd, and share your twists in the comments below. More banana magic awaits!
PrintMoist Banana Walnut Cake Recipe (Easy & Ultra Moist!)
Ultra-moist Banana Walnut Cake with cream cheese frosting delivers perfect crunch from toasted walnuts and max flavor from overripe bananas. This easy recipe serves 12-16, freezes beautifully, and turns ripe banana bounty into bakery perfection.
- Prep Time: PT20M
- Cook Time: PT35M
- Total Time: PT3H
- Yield: 12-16 servings
- Category: Dessert, Cake
- Method: Baking
- Cuisine: American
Ingredients
For the Cake:
4 large overripe bananas (about 1 1/2 cups mashed)
3 cups all-purpose flour (spooned and leveled)
1 1/2 teaspoons baking soda
1 teaspoon ground cinnamon
1/2 teaspoon salt
10 tablespoons unsalted butter, softened
3/4 cup granulated sugar
3/4 cup packed light brown sugar
3 large eggs, room temperature
2 teaspoons pure vanilla extract
1 cup sour cream, room temperature
1/2 cup buttermilk, room temperature
1 cup walnuts, chopped and toasted
For the Cream Cheese Frosting:
8 ounces full-fat cream cheese, softened
1/2 cup unsalted butter, softened
3 cups powdered sugar, sifted
1 teaspoon pure vanilla extract
Pinch of salt
1/2 cup chopped toasted walnuts, for garnish
Instructions
1. Preheat and Prep: Set oven to 350°F (177°C). Grease a 9×13-inch pan, or two 8-inch round pans for layers, or a bundt pan. Line with parchment for easy release.
2. Mash Bananas: Peel and mash bananas with a fork until smooth with some chunks for texture. Set aside.
3. Mix Dry Ingredients: Whisk flour, baking soda, cinnamon, and salt in a medium bowl.
4. Cream Butter and Sugars: Beat butter, granulated sugar, and brown sugar on medium-high until pale and fluffy, about 3 minutes. Add eggs one at a time, beating well after each. Mix in vanilla.
5. Combine Wet and Dry: Add mashed bananas to the butter mixture. On low speed, alternate adding dry ingredients and sour cream/buttermilk (start and end with dry). Mix just until combined, about 30 seconds. Fold in chopped walnuts gently to avoid toughness.
6. Bake: Pour batter evenly into pan(s). For 9×13, bake 35-40 minutes; 8-inch layers 25-30 minutes; bundt 50-60 minutes. Toothpick in center should come out clean or with moist crumbs. Cool in pan 10 minutes, then fully on wire rack.
7. Make Frosting: Beat cream cheese and butter until smooth. Gradually add powdered sugar, vanilla, and salt. Beat on high until fluffy, 2 minutes.
8. Frost and Serve: For sheet cake, spread frosting evenly and sprinkle walnuts. For layers, level cakes, add crumb coat, chill 30 minutes, then frost fully. Garnish with walnuts.
Notes
Pro Baking Tips:
– Weigh flour (360g) for precision; too much dries it out.
– Don’t overmix batter; gluten makes it tough.
– Test ripeness: Bananas should smell sweet and yield to gentle pressure.
– For extra moisture, tent foil loosely after 25 minutes if tops brown fast.
Storage: Room temp 2 days covered, fridge 5 days, freeze unfrosted 2 months.
Variations: Layer (2×8″ pans), gluten-free (1:1 flour), nut-free (choc chips), bundt, cupcakes.