Desserts
This banana and peanut butter cake recipe delivers the perfect balance of moist, tender crumb and rich, nutty swirls—ideal for UK bakers who love a comforting yet impressive dessert. 🌟 The secret lies in ripe bananas that keep the cake wonderfully soft, while a generous swirl of peanut butter adds depth and a satisfying texture contrast. I’ve tested this recipe countless times to ensure it’s foolproof, even for beginners, with clear steps that guarantee a golden, crackly top every time.
The beauty of this cake is its simplicity—just a handful of ingredients, no fancy techniques, and a 30-minute prep time before it goes into the oven. The peanut butter swirl isn’t just for looks; it infuses each bite with that unmistakable, creamy peanut flavor, while the banana adds natural sweetness without needing extra sugar. Perfect for tea time, birthdays, or when you’re craving something indulgent but still homely.
What makes this version stand out is the UK-friendly adjustments, like using metric measurements and swapping ingredients for easy availability. The result? A cake that’s rich, moist, and packed with that irresistible peanut-butter aroma. Whether you’re serving it warm with a dusting of icing sugar or letting it cool for slices later, this recipe is designed to impress without the fuss.
For extra indulgence, fold in chocolate chips or a sprinkle of sea salt into the batter—both elevate the flavors beautifully. The cake keeps well for up to three days, making it perfect for meal prep or gifting. Ready to bake? Let’s get started with the full recipe.
Ingredients for banana and peanut butter cake recipe uk
Ripe bananas and creamy peanut butter—just seven core ingredients for this UK-style nutty swirl delight.
| Ingredient | Amount | Notes |
|---|---|---|
| Ripe Bananas 🍌 | 3 whole | Spotty skin preferred for sweetness |
| Creamy Peanut Butter 🥜 | 1 cup | Natural, no added sugar |
| All-Purpose Flour 🌾 | 2 cups | Plus 2 tbsp for swirl |
| Granulated Sugar 🍚 | 1 ½ cups | Standard white sugar |
| Brown Sugar 🍚 | ½ cup | Packed firmly |
| Unsalted Butter 🧈 | 1 cup | Room temperature, salted |
| Large Eggs 🥚 | 2 whole | Room temperature preferred |
| Vanilla Extract 🌿 | 1 tsp | Pure extract preferred |
| Baking Soda 🧂 | 1 tsp | Pure baking soda |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Milk 🥛 | ½ cup | Whole milk preferred |
| Chocolate Chips 🍫 | 1 cup | Optional, semi-sweet |
| Flaky Sea Salt 🧂 | 1 tsp | For final sprinkle |
Ripe bananas are non-negotiable here—look for those with brown spots on the peel, which means natural sweetness. Tesco or Sainsbury's usually have perfect ones, or grab a bunch and let them sit on the counter for a day or two. The peanut butter? Skippy or Smucker's creamy works best—no crunchy bits in this cake. For the chocolate chips, Cadbury Dairy Milk is a UK classic, but any semi-sweet will do. The butter should be room temperature when measuring, or you'll end up with lumps. I always double-check my eggs are room temp too—mixes better that way.
No ripe bananas? Overripe ones work even better—just mash them extra well. Out of peanut butter? Almond butter or cashew butter gives a similar texture, though the flavor shifts. The chocolate chips can be swapped for white chocolate chunks or even chopped nuts if you're feeling fancy. Want extra indulgence? Fold in 1/2 cup chopped walnuts or pecans with the chocolate chips. The milk can be swapped for plant-based milk if needed, though the texture might be slightly lighter. For a richer cake, add 1 tbsp cocoa powder to the dry ingredients—trust me, it's amazing.
This cake keeps beautifully for 3-4 days at room temperature, wrapped in foil. For longer storage, 5 days in the fridge or 3 months in the freezer. I like to slice it warm and serve with a sprinkle of flaky sea salt—the contrast is next level. To reheat, wrap a slice in foil and microwave for 10-15 seconds. Leftovers? They're even better the next day—if they last that long!
Why You'll Love This Recipe
- No Mixer Needed: I’ll admit, I’ve burned cakes before trying to overmix batter—but this one’s forgiving. Mash those ripe bananas right in the bowl, stir in the peanut butter until it’s just combined, then fold in the dry ingredients. No electric mixer, no fuss, and still comes out moist and tender every single time.
- Peanut Butter Magic: That creamy peanut butter isn’t just an add-in—it’s the star. The brown sugar deepens the flavor while keeping it from being too sweet, and the ripe bananas add natural moisture without overpowering. Honestly, I’ve had people ask if it’s gluten-free just from the first bite.
- Pantry Staple Power: Between us, this recipe uses things you already have lurking in your cupboards. No specialty ingredients, no last-minute grocery runs—just bananas (use the ones with brown spots!), peanut butter, and basic flour. It’s my go-to when I’ve got nothing but a few basics and a craving for something sweet.
- Leftovers That Last: This cake actually improves the next day—yes, really. The flavors meld even better, and it’s perfect for packing in lunches or sneaking as an after-dinner treat. I’ll be real: I’ve eaten slices cold straight from the fridge, and it’s still spot-on. Plus, it freezes beautifully if you’re planning ahead.
Step-by-step instructions for banana and peanut butter cake
Here's how to create that perfect nutty swirl—moist, rich, and bursting with banana flavor!
👨🍳 Step 1: Mash the Bananas and Mix Wet Ingredients
Start by mashing the 3 whole ripe bananas in a large mixing bowl until completely smooth—no lumps! The riper the bananas, the sweeter your cake will be. In a separate bowl, cream together the 1 cup unsalted butter and both sugars (1.5 cups granulated sugar and 0.5 cup brown sugar) on medium speed until light and fluffy, about 3-4 minutes. This step is crucial for that tender texture.
Add the 2 whole large eggs one at a time, mixing well after each addition. Stir in the 1 cup creamy peanut butter, 1 tsp vanilla extract, and 0.5 cup milk until fully combined. Here's the thing—don't overmix! The batter should be smooth but still slightly thick. If it looks too runny, let it sit for 5 minutes before proceeding.
👨🍳 Step 2: Combine Dry Ingredients and Fold in Swirl
In a medium bowl, whisk together the 2 cups all-purpose flour, 1 tsp baking soda, and 0.5 tsp salt. Gently fold this dry mixture into your wet ingredients using a spatula, mixing just until combined. You'll want to see a few flour streaks remaining—overmixing develops gluten, which makes the cake tough.
Now for the swirl! Scoop out 1 cup of the batter and place it in a separate bowl. To this portion, add 1 cup chocolate chips and mix well. Drop spoonfuls of this chocolate chip batter back into the main batter, gently swirling with a knife to create those beautiful marbled streaks. This is where the magic happens—those pockets of chocolate will melt into gooey surprise bites!
🔥 Step 3: Bake to Golden Perfection
Preheat your oven to 350°F and grease a 9-inch round cake pan (or line it with parchment paper). Pour the batter into the prepared pan and smooth the top. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean with just a few moist crumbs. The edges should be golden brown, but the center should still have a slight bounce—it'll continue cooking as it cools.
Here's a pro tip: If you notice the top browning too quickly, tent the cake with aluminum foil after 20 minutes of baking. The cake is done when it springs back slowly when gently pressed in the center. Remove from the oven and let it cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
🍽️ Step 4: Add the Finishing Touches
Once the cake has cooled completely, sprinkle the top generously with 1 tsp flaky sea salt—this balances the sweetness and adds a sophisticated touch. For extra decadence, you can drizzle a little extra peanut butter or chocolate ganache over the top. Slice and serve warm for that melt-in-your-mouth texture, or at room temperature for a more structured bite.
This cake keeps well at room temperature for 2-3 days in an airtight container, though I promise it won't last that long! The combination of ripe bananas and rich peanut butter creates a moist, flavorful cake that's perfect for breakfast, dessert, or even a mid-afternoon treat. Enjoy every last crumb—it's worth every minute!
Pro Tips For Making Banana And Peanut Butter Cake Recipe Uk
- Mash Bananas First: Don’t just toss in whole bananas—mash them properly with a fork until smooth, but leave a few tiny lumps. I learned this the hard way: unmixed bananas sink to the bottom and leave a dense, gummy layer. A quick blend in the food processor saves time and ensures even distribution.
- Use Warm Peanut Butter: Scoop peanut butter straight from the fridge and you’ll end up with a cake that’s too thick and heavy. Microwave it for 10–15 seconds to loosen it up—this guarantees a smoother batter and richer flavor. (Yes, even if you’re impatient like me.)
- Check Oven Temp Early: This cake’s texture hinges on a precise bake. After 20 minutes, stick a skewer in—if it comes out with wet batter, crank the oven to 180°C (160°C fan) and bake another 10. Overbaking turns it dry; underbaking leaves it gummy. No guesswork.
- Swap Half the Flour: All-purpose flour can make this cake dense. Replace half with self-raising flour (or add 1 tsp baking powder per 100g flour) for lift. My grandmother swore by this, and she was right: the result is lighter and less crumbly. (Your future self will thank you.)
Creative variations of banana and peanut butter cake recipe uk
UK-Style Chocolate Twist
Swap the chocolate chips for Cadbury Dairy Milk buttons or chopped Cadbury Caramel bars—both add that unmistakable UK chocolate flavor. For an extra indulgent twist, fold in ½ cup chopped dates with the chocolate for a caramelized depth that pairs beautifully with peanut butter. I love adding 1 tbsp cocoa powder to the dry ingredients for a richer, deeper chocolate note throughout the cake. 🍫
Nutty Swirl Upgrade
For a more intense peanut flavor, replace the peanut butter swirl with a peanut butter frosting between layers. Mix ½ cup creamy peanut butter, 2 tbsp softened butter, and 1 cup icing sugar until smooth, then spread between cake layers. Top with crushed Peanut Butter Cups for a showstopping finish. This version is a crowd-pleaser at UK birthday parties!
Spiced Banana Version
Add warmth with ½ tsp ground cinnamon and ¼ tsp ground nutmeg to the dry ingredients for a spiced banana cake. The spices complement the peanut butter beautifully and give it a cozy, autumnal vibe. For extra depth, stir in 1 tsp orange zest with the mashed bananas—it brightens the flavor and balances the richness. Perfect for a festive twist!
Gluten-Free Adaptation
To make this cake gluten-free, replace the 2 cups all-purpose flour with a 1:1 gluten-free baking flour blend (like Doves Farm). Add ½ tsp xanthan gum to help bind the mixture. For extra moisture, reduce the milk to ¼ cup and increase the mashed bananas to 4 whole. The texture stays tender, and the peanut butter swirl remains just as delicious. 🌱
Vegan Option
For a vegan version, use vegan butter (like Flora Plant Butter) and replace the eggs with 2 tbsp ground flaxseed mixed with 6 tbsp water (let it sit for 5 minutes to thicken). Swap the milk for almond or oat milk, and ensure your peanut butter is vegan-friendly. The cake will still be moist and packed with flavor—just as indulgent as the original! 🌿
Nutrition facts
Frequently asked questions
Can I use overripe bananas for this cake? Overripe bananas with brown spots are actually ideal—they're sweeter and mash more smoothly. The cake will be extra moist and flavorful. Just
What's the best way to store leftovers?
Keep your cake fresh by wrapping it tightly in cling film or storing in an airtight container. It stays delicious for 3-4 days at room temperature, or up to 5 days in the fridge. For longer storage, freeze slices wrapped individually for up to 3 months. Reheat in the microwave for 10-15 seconds to restore that warm, gooey texture.
Why did my cake turn out dense?
Overmixing the batter is the most common cause—this develops gluten, making the cake tough. Also check your baking soda (should be fresh) and make sure you're not using too much flour. For extra moisture, try adding 1 tbsp yogurt to the wet ingredients or slightly underbaking by 2-3 minutes for a softer center that sets as it cools.
Can I make this cake without chocolate chips?
Skip the chocolate chips and either leave the swirl plain peanut butter, or add 1 cup chopped nuts (walnuts or pecans work beautifully) or ½ cup dried fruit like cranberries or raisins. The peanut butter flavor will still shine through—it's the star of this cake! For a UK twist, try chopped dates with a sprinkle of cinnamon.
How do I make this cake gluten-free?
Replace the 2 cups all-purpose flour with a 1:1 gluten-free baking flour blend (like Doves Farm) and add ½ tsp xanthan gum to help bind the mixture. Reduce the milk to ¼ cup and increase mashed bananas to 4 whole for extra moisture. The texture will still be tender and perfect for that peanut butter swirl.