Banana and walnut traybake is the kind of bake that quietly wins everyone over. It’s simple, comforting, and makes the whole kitchen smell warm and inviting. You don’t need fancy equipment or perfect piping—just ripe bananas, a handful of nuts, and a baking tray.

It’s ideal for a weekend bake, school snacks, or something sweet with your afternoon coffee. And the best part? It stays soft for days and slices beautifully.

What Makes This Special

This traybake brings together the best of a banana bread and a light cake.

It’s soft, moist, and gently sweet, with a subtle crunch from the walnuts. The batter comes together quickly, and it’s very forgiving—perfect if you’re new to baking or want something fuss-free.

You can enjoy it plain or top it with a light glaze if you like things a bit sweeter. It’s also a smart way to use up bananas that are past their best.

Ripe bananas add natural sweetness and help keep the crumb tender without needing loads of sugar.

Ingredients

• 3 large ripe bananas (the spottier, the better)
• 120 g unsalted butter, melted and slightly cooled (or 120 ml neutral oil)
• 150 g light brown sugar (or a mix of brown and caster sugar)
• 2 large eggs, at room temperature
• 1 tsp vanilla extract
• 220 g plain flour (all-purpose)
• 1 tsp baking powder
• 1/2 tsp bicarbonate of soda (baking soda)
• 1/2 tsp fine salt
• 1 tsp ground cinnamon (optional but lovely)
• 100 g walnuts, roughly chopped
• 60 ml milk (any kind)
• Optional topping: 2 tbsp demerara sugar for crunch, or a simple glaze (80 g icing sugar + 1–2 tbsp milk)

Equipment: 9×13-inch (about 23×33 cm) traybake tin, baking parchment, mixing bowls, whisk or electric hand mixer, spatula.

Instructions

1. Heat the oven and prep the tin. Set your oven to 180°C (160°C fan) or 350°F. Line your traybake tin with parchment, leaving a little overhang for easy lifting later.
2. Mash the bananas. In a large bowl, mash the bananas with a fork until mostly smooth with a few small lumps. You should have about 1 to 1 1/4 cups of mash.
3. Mix the wet ingredients. Whisk in the melted butter, brown sugar, eggs, vanilla, and milk until smooth and glossy.
4. Combine the dry ingredients. In a separate bowl, whisk the flour, baking powder, bicarbonate of soda, salt, and cinnamon.
5. Bring the batter together. Add the dry mixture to the wet and gently fold with a spatula just until you no longer see flour.Don’t overmix—this keeps the traybake tender.
6. Add the walnuts. Fold in the chopped walnuts. If you like, reserve a small handful to scatter on top for extra crunch.
7. Fill the tin. Pour the batter into the lined tin and smooth the surface. Sprinkle with reserved walnuts and a little demerara sugar if using.
8. Bake. Bake for 22–28 minutes, or until the top is golden and a skewer inserted into the center comes out clean or with a few moist crumbs.
9. Cool and slice. Let it cool in the tin for 10 minutes, then lift out using the parchment.Cool on a rack, slice into squares, and serve slightly warm or at room temperature.
10. Optional glaze. If you want a light glaze, whisk icing sugar with milk to a pourable texture, then drizzle over the cooled traybake.

Storage Instructions

• Room temperature: Store in an airtight container for 3–4 days. The flavor often improves by day two.
• Refrigerator: Keeps up to a week, but bring slices to room temperature before serving for best texture.
• Freezer: Wrap individual slices and freeze for up to 2 months. Thaw at room temperature or warm gently in the microwave.
• Glazed versions: If you’ve glazed it, let the glaze set fully before stacking, or place parchment between layers.

Benefits of This Recipe

• Quick and reliable: The batter comes together in minutes and bakes fast, making it great for weekday treats or last-minute guests.
• Uses pantry basics: No special ingredients or equipment required.
• Moist and flavorful: Ripe bananas add natural sweetness and keep the crumb soft without needing excessive fat.
• Easy to customize: Swap nuts, add spices, or throw in chocolate chips—this base recipe is flexible.
• Perfect for sharing: Traybakes slice neatly and travel well for picnics, office bakes, or school events.

Common Mistakes to Avoid

• Using under-ripe bananas: Green or just-yellow bananas won’t deliver the sweetness and moisture you need.Wait until they’re spotty and soft.
• Overmixing the batter: Stir just until combined. Overmixing develops gluten and makes the cake dense or tough.
• Overbaking:</-strong> This traybake goes from perfect to dry quickly. Start checking early, and pull it once a skewer has a few moist crumbs.
• Skipping the salt: A small amount of salt balances sweetness and brings out banana and nut flavors.
• Adding too many mix-ins: Extra nuts, fruit, or chips are great, but keep add-ins to about 150 g total or you’ll weigh down the crumb.

Alternatives

• Nut-free: Replace walnuts with sunflower or pumpkin seeds, or leave them out entirely.Add a handful of chocolate chips for texture.
• Wholemeal twist: Swap up to half the plain flour for wholemeal (whole wheat) flour. Add an extra tablespoon of milk to keep it soft.
• Dairy-free:</-strong> Use oil instead of butter and a plant-based milk. Make sure your glaze is dairy-free if you’re using it.
• Gluten-free: Use a good 1:1 gluten-free baking mix with xanthan gum.Check your baking powder is gluten-free too.
• Spiced version: Add 1/2 tsp ground nutmeg or ginger along with the cinnamon. A pinch of cardamom is lovely as well.
• Banana-chocolate: Fold in 100 g dark chocolate chips and reduce walnuts to 60 g to keep the balance right.

FAQ

Can I use frozen bananas?

Yes. Thaw them completely, then drain excess liquid and mash.

Frozen bananas often produce an even stronger banana flavor, which works well here.

What if I only have self-raising flour?

Use 220 g self-raising flour and omit the baking powder. Keep the bicarbonate of soda at 1/2 tsp because it reacts with the banana and helps lift the cake.

How do I know it’s done without overbaking?

Look for a golden top that springs back lightly when touched. A skewer should come out clean around the edges and with a few moist crumbs in the center.

If it’s wet, give it a couple more minutes.

Can I make this into muffins?

Absolutely. Divide the batter into a lined 12-cup muffin tin and bake at the same temperature for 16–20 minutes. Start checking at 15 minutes.

Is there a way to reduce the sugar?

You can reduce the brown sugar to 120 g without compromising structure.

The bananas provide natural sweetness, especially when very ripe.

Do I have to use walnuts?

No. Pecans are a great swap, and almonds work too. For a nut-free version, use seeds or leave them out and add extra spice or chocolate chips.

Why is my traybake dense?

Likely overmixing or too much flour.

Weigh your flour if possible, or spoon and level it. Mix gently until just combined, and don’t skip the baking soda.

Can I add a cream cheese frosting?

Yes, it’s delicious. Make sure the cake is fully cool before frosting.

Because cream cheese frosting is softer, store the frosted traybake in the fridge.

Final Thoughts

This banana and walnut traybake is the kind of bake you keep coming back to—simple, cozy, and consistently good. It’s quick to make, easy to share, and adaptable to whatever you have in the cupboard. Whether you serve it plain with coffee or dressed up with a glaze, it delivers every time.

Keep a few ripe bananas on standby, and you’ll always have a crowd-pleasing treat within reach.