A Cozy British Bake You’ll Fall in Love With

If you’ve ever found yourself craving something that’s equal parts comforting, fruity, and indulgent—but still super easy to make—let me introduce you to one of my favorite bakes of all time: Rhubarb Crumble Traybake Cake. It’s everything we love about British baking, packed into one tray and finished off with a gorgeous golden crumble. Honestly, it’s like having a slice of pudding and cake all in one bite. And yes, it’s just as dreamy as it sounds!

I’ve made this recipe more times than I can count, especially during rhubarb season when I somehow end up with more stalks than I know what to do with. It’s a brilliant bake to share with friends, perfect for a casual afternoon tea, and so easy to portion out for freezing or lunchbox treats.

So whether you’re a longtime rhubarb fan or someone who’s just looking to try something a bit different than the usual chocolate cake routine, this traybake is the perfect place to start. Let’s get baking!

Ingredients You’ll Need

 

Here’s everything you need to pull together this lovely rhubarb crumble traybake. It’s likely you already have most of these ingredients in your kitchen!

For the Cake:

• 225g self-raising flour

• 225g unsalted butter, softened (plus extra for greasing)

• 225g caster sugar

• 4 medium eggs

• 1 tsp vanilla extract

• 2 tbsp whole milk

• 300g rhubarb, trimmed and chopped into 1cm pieces

• 2 tbsp light brown soft sugar (for tossing the rhubarb)

For the Crumble Topping:

• 100g plain flour

• 50g unsalted butter, chilled and cubed

• 50g demerara sugar

Step-by-Step Instructions

Step 1: Prep Your Tin and Oven

Preheat your oven to 170°C (fan). Grease a 20 x 30cm traybake tin and line it with parchment paper. This step is key—nobody wants their beautiful bake sticking to the pan!

Step 2: Sweeten the Rhubarb

In a bowl, toss your chopped rhubarb with 2 tablespoons of light brown sugar. This little sugar coating will help tame some of that natural tartness and give you beautifully juicy fruit once it bakes. Set that aside to macerate while we whip up the batter.

Step 3: Make the Cake Batter

Grab a large mixing bowl and cream the butter and caster sugar together until the mixture turns pale and fluffy. This usually takes a few minutes—don’t rush it! It’s the air you whip in here that helps keep the sponge light.

Next, beat in the eggs one at a time, mixing well after each addition. If the mixture starts to look a little curdled, don’t panic—it’ll come together once you add the flour.

Stir in the vanilla extract and milk, giving everything a quick mix.

Then, gently fold in the self-raising flour. Be careful not to overmix—just combine until no dry patches remain. The batter should look soft and creamy.

Step 4: Layer It Up

Spoon the cake batter into your prepared tray and level the top with a spatula. Now, scatter your sweetened rhubarb evenly over the surface of the batter. You want a good distribution so that every slice gets some fruity goodness.

Crumble Topping, Baking, and Handy Tips

Okay, now that we’ve got our soft, buttery sponge batter in the tray and dotted with tart-sweet rhubarb, it’s time to give this beauty the finishing touch: a golden, crunchy crumble topping. If you ask me, this is the part that takes this traybake from “nice” to “can’t-stop-eating-it” status. There’s just something about that sweet, slightly crispy topping paired with soft fruit and cake that makes it irresistible.

Let’s get into it!

Step-by-Step Instructions

Step 5: Make the Crumble Topping

To whip up your crumble topping, you’ll need just three ingredients: plain flour, cold butter, and demerara sugar. It’s a simple mix, but don’t underestimate how much flavor and texture it brings to the final bake!

Start by adding 100g plain flour and 50g chilled, cubed butter to a bowl. Using your fingertips, rub the butter into the flour until the mixture resembles breadcrumbs. You want that slightly rough, crumbly texture—not too fine, not too chunky. It should look like coarse sand with a few small lumps of butter still visible.

Once you’ve got that texture, stir in 50g of demerara sugar. This type of sugar gives the crumble a lovely crunch and caramel flavor that works beautifully with the tart rhubarb and soft sponge underneath.

Step 6: Sprinkle and Bake

Now for the fun part—sprinkle the crumble topping evenly over the rhubarb. Don’t worry if some rhubarb peeks through here and there. That’s part of the charm! You’ll end up with lovely pink patches bubbling up through the golden crumble.

Once everything is assembled, pop the tray into your preheated oven and bake for 45 to 50 minutes. You’re looking for a beautiful golden color on top, and a skewer inserted into the center should come out clean (well, maybe with a touch of juicy rhubarb on it—that’s okay!).

Step 7: Cool and Slice

When it’s done baking, resist the urge to dig in right away. Let it cool completely in the tin—this helps everything set nicely and makes slicing much easier.

Once cooled, slice into 15 squares (or smaller if you’re serving at a gathering—these go fast!). The cake will be soft, the rhubarb juicy, and the crumble sweet and crisp. It’s seriously the best of all worlds.

Baking Tips and Variations

Now that you’ve got the basics down, here are a few extra tips to help you make the most out of this bake—and maybe even make it your own!

1. Use Up Extra Rhubarb

If you’ve got a bit more rhubarb than the recipe calls for, you can sneak in an extra 50g or so. Just toss it with a bit more sugar and scatter evenly. Try not to go overboard, though—too much moisture can make the sponge soggy.

2. Make it More Fruity

This recipe plays beautifully with other fruits, too. Try swapping out half the rhubarb for strawberries in early summer, or even raspberries for a tangier twist. Apples also pair wonderfully with rhubarb and add a bit more body.

3. Add a Hint of Spice

If you want to warm up the flavor a bit, add ½ teaspoon of ground ginger or cinnamon to the crumble topping. It’s subtle but adds a cozy, spiced dimension that works especially well in cooler months.

4. Don’t Skip the Cooling Time

It can be so tempting to slice into this straight from the oven, but trust me—letting it cool completely helps the structure set and makes slicing much cleaner. Plus, the flavors mellow and come together beautifully as it cools.

5. Freeze It for Later

This traybake freezes beautifully. Once completely cool, slice it and wrap individual portions in cling film, then store in an airtight container or freezer bag. They’ll last a good couple of months, and you can thaw a slice whenever the craving strikes.

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By now, your kitchen is probably filled with the delicious scent of golden crumble and sweet rhubarb, and maybe you’ve even snuck a bite while it was cooling (I won’t tell!). Whether you’re planning to serve this up with a dollop of custard or enjoy it cold with a good strong cup of tea, there’s just something about this traybake that hits all the right notes—comforting, nostalgic, and surprisingly easy.

Before we wrap things up, let’s go over a few of the most frequently asked questions that pop up when it comes to this lovely bake.

FAQ: Your Rhubarb Crumble Traybake Questions, Answered

1. Can I use frozen rhubarb instead of fresh?

Yes, absolutely! Just make sure to thaw it completely and drain off any excess liquid before tossing it with the sugar and adding it to your batter. This helps prevent the cake from getting soggy.

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2. What if I don’t have self-raising flour?

You can easily make your own. For every 225g of plain flour, add 2 teaspoons of baking powder and a pinch of salt. Mix well before using in the recipe.

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3. Can I make this gluten-free?

Yes! Use a gluten-free self-raising flour blend for the sponge and a gluten-free plain flour for the crumble topping. Just double-check your baking powder is also gluten-free if you’re making your own self-raising flour.

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4. How should I store the cake?

Once cooled, store the cake in an airtight container at room temperature for up to 3 days. If your kitchen is particularly warm, pop it in the fridge. It also freezes well for up to 2 months—just wrap individual pieces for easy snacking later!

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5. Can I double the recipe for a crowd?

Definitely. You can double the ingredients and bake it in two trays or one larger baking tin. Just keep an eye on the bake time—it may need an extra 5–10 minutes, depending on the thickness of the batter.

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6. What can I serve it with?

This traybake is delicious on its own, but it’s also dreamy served warm with custard, a scoop of vanilla ice cream, or even a spoonful of thick cream. If you’re serving it as a dessert, you can even drizzle over some warm caramel for an extra indulgent twist.

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7. Why is my cake a bit too wet in the middle?

This is usually down to the rhubarb releasing moisture while baking. Make sure to cut your rhubarb into small pieces and toss it with sugar ahead of time, then drain any excess liquid before scattering it over the batter. Also, always check your bake with a skewer—if it comes out with uncooked batter, give it an extra few minutes in the oven.

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Final Thoughts: One Bake, So Many Moments

If I had to pick one traybake that feels like a warm hug on a plate, this rhubarb crumble traybake would be it. It brings together the nostalgic tartness of seasonal rhubarb, the soft comfort of sponge cake, and the irresistible crunch of golden crumble topping—all with very little fuss in the kitchen.

It’s the kind of bake that makes you feel a bit proud when you bring it out for guests, but is just as wonderful eaten in comfy clothes on the couch with a fork straight from the tray (yes, guilty!).

So next time you spot rhubarb at the market or in your garden, you know what to do. Bake this cake. Enjoy it. Share it (or don’t). And when you do, I’d love to hear how it turned out for you.

Leave a comment if you tried a fun twist—maybe you swapped in berries, added a spice, or turned it into a dessert with custard. Let’s swap stories and inspire each other to keep baking, one slice at a time.

Happy baking, friends!

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