Delia Smith Rhubarb Crumble Recipe

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Few puddings feel as reassuring as a bowl of warm rhubarb crumble with custard trickling over the top. It’s one of those dishes that turns up at family Sunday lunches, church fetes, and quiet weeknight dinners alike, and it rarely disappoints anyone at the table.

Delia Smith has long been associated with this kind of no-nonsense British cooking. Her recipes tend to strip a dish back to what actually matters — good technique, the right proportions, and a method you can follow without second-guessing yourself.

Ingredients Needed

• 800g–900g fresh rhubarb, trimmed and cut into roughly 2.5cm (1 inch) pieces
• 100g–110g caster sugar (adjust depending on how tart the rhubarb is)
• 1 tablespoon of water or orange juice
• Optional: a teaspoon of ground ginger, or the zest of an orange, for extra depth

For the crumble topping:

• 175g plain flour
• 110g cold, unsalted butter, cubed
• 75g–110g sugar (a mix of caster and demerara gives the best texture)
• Optional: a handful of rolled oats or flaked almonds for extra crunch

Equipment

You don’t need anything unusual for this recipe, but a few basics make it easier:

• A medium to large ovenproof baking dish (around 1.5–2 litre capacity)
• A large mixing bowl for the topping
• A sharp knife and chopping board for the rhubarb
• Weighing scales, since crumble ratios matter more than most people expect

How to make Rhubarb Crumble

Prepare the Rhubarb

Preheat your oven to 200°C (400°F/Gas Mark 6). Wash the rhubarb thoroughly, trim away the ends and discard all the leaves. Cut the stalks into roughly 2.5cm (1-inch) pieces.

Place the chopped rhubarb in a shallow ovenproof baking dish. Sprinkle over the sugar and ground ginger, then add the tablespoon of water. Toss gently so the rhubarb is evenly coated.

Make the Crumble Topping

Sift the plain flour into a large mixing bowl and add the cold cubed butter. Rub the butter into the flour with your fingertips until the mixture resembles coarse breadcrumbs.

Work lightly and avoid pressing the mixture together. Once the crumbs have formed, stir through the demerara sugar so it is evenly distributed throughout the topping.

Cover the Rhubarb

Scatter the crumble mixture over the prepared rhubarb, making sure the fruit is covered from edge to edge. Keep the topping loose rather than pressing it firmly onto the fruit.

A loose layer allows the heat to circulate through the crumble and helps create a lighter, crispier topping as it bakes.

Bake the Crumble

Place the baking dish on a baking tray and put it in the centre of the preheated oven. Bake for 35–40 minutes, or until the topping is golden brown and the rhubarb juices are bubbling around the edges.

Once baked, remove the crumble from the oven and let it stand for a few minutes. This allows the fruit juices to settle slightly before serving.

Important Cooking Tips

A few small details separate an average crumble from a genuinely good one.

• Keep the butter cold. If it starts to soften while you’re rubbing it in, pop the bowl in the fridge for a few minutes before continuing.
• Don’t overwork the mixture. Once it looks like coarse crumbs, stop — overmixing melts the butter into the flour and produces a denser, less crumbly texture.
• Resist the urge to press the topping down. It should sit loosely over the fruit so air can circulate and crisp it up.
• Taste your rhubarb before adding sugar if you can. Early-season stalks are often sweeter, while late-season rhubarb can be sharp enough to need a touch more sugar.
• Bake on a middle shelf so the topping colours evenly without the base staying pale.

Common Mistakes and How to Avoid Them

A soggy topping. This usually happens when the crumble mixture is pressed down too firmly, trapping steam from the fruit underneath. Keep the topping loose and airy instead.

Watery filling. Very juicy rhubarb can release more liquid than expected. If this is a regular problem, stir a teaspoon of plain flour or cornflour into the fruit before topping it — this thickens the juices as they bake.

Overly sharp flavour. Rhubarb’s tartness varies a lot from batch to batch. If your first attempt tastes too sour, increase the sugar slightly next time, or pair it with a slightly sweeter fruit.

Butter that’s too warm. If the butter melts into the flour rather than staying in distinct pieces, the topping bakes up tough and biscuit-like rather than short and crumbly. Chilling the butter beforehand solves this.

Variations and Substitutions

Rhubarb crumble is a forgiving base for experimenting once you’ve got the method down.

Rhubarb and ginger: Add a teaspoon of ground ginger to the fruit, or fold in a spoonful of finely chopped stem ginger for little pockets of warmth.

Rhubarb and strawberry: Swap a third of the rhubarb for hulled, halved strawberries for a rounder, sweeter filling.

Rhubarb and orange: The zest and a splash of the juice bring out rhubarb’s natural sharpness nicely, without needing extra sugar.

Nutty topping: Stir in flaked almonds or chopped hazelnuts for extra crunch and a slightly toasted flavour.

Oat topping: Replacing a portion of the flour with rolled oats gives a heartier, more textured crumble — closer in spirit to a fruit crisp.

Gluten-free version: A good gluten-free plain flour blend works well in place of ordinary flour, though the topping may need an extra minute or two in the oven to colour fully.

If you’ve already tried Delia’s apple crumble recipe, you’ll notice the topping method here is almost identical — it’s really the fruit filling that changes character from one crumble to the next.

Serving Suggestions

Rhubarb crumble is at its best served warm, not piping hot, so the topping stays crisp rather than steaming itself soft. Classic custard is the traditional pairing, but there are other good options too:

• Pouring cream or clotted cream
• A scoop of vanilla ice cream
• Crème fraîche, for a slightly tangy contrast to the sweetness
• A light dusting of icing sugar for a simple finishing touch

Save

For a dinner party, it works nicely as a lighter follow-on after something like chicken basque or another savoury main, giving guests a comforting, fruit-forward end to the meal.

Storage

Rhubarb crumble keeps well, which makes it a good make-ahead pudding.

In the fridge: Once completely cool, cover the dish and store it in the fridge for up to three days.

In the freezer: Baked crumble freezes well for up to three months. Wrap it tightly or transfer it to a freezer-safe container once cooled.

Make-Ahead Advice

If you’re preparing for a gathering, you can assemble the crumble a day in advance and keep it covered in the fridge, unbaked, until you’re ready to cook it. This actually helps, since the topping firms up slightly and holds its shape well in the oven.

Alternatively, prepare the crumble topping and the rhubarb filling separately and store them apart for up to two days before combining and baking. This stops the topping from absorbing moisture from the fruit while it waits.

You may also like these:

• All-in-One Victoria Sponge Recipe
• Chocolate Roulade
• Pavlova

Nutrition Facts

Nutrient	Approx. per serving
Calories	390–450 kcal
Carbohydrates	60–70 g
Protein	4–6 g
Fat	16–20 g
Saturated Fat	10–12 g
Sugars	30–40 g
Fibre	2–4 g
Salt	0.1–0.3 g

These figures are for the crumble itself and do not include custard, cream or ice cream served alongside it. Adding a generous serving of custard or ice cream will increase the calories, sugar and fat content.

Frequently Asked Questions

Can I use frozen rhubarb instead of fresh?

Yes. There’s no need to defrost it first — simply add a few extra minutes to the baking time, since frozen rhubarb releases more liquid as it cooks.

Why is my crumble topping too hard?

This is usually a sign the butter was too warm when it was rubbed in, or that the topping was pressed down before baking. Keep the butter cold and the mixture loose for a proper crumbly texture.

Do I need to peel rhubarb before cooking it?

No. Young, tender stalks don’t need peeling at all. If your rhubarb has thicker, stringier stalks, you can peel away any tough outer strands with a vegetable peeler, though this is rarely necessary.

Can I make this crumble without sugar in the topping?

You can reduce it, but leaving it out entirely will change the texture, since sugar helps the topping crisp and colour as it bakes. A small reduction is usually the better compromise.

What’s the best way to know it’s fully cooked?

Look for a deep golden topping and fruit visibly bubbling at the edges of the dish. If the topping has coloured but the filling still looks pale and undisturbed, give it another five minutes.

Can I add other fruits to the filling?

Absolutely. Apple, strawberry, and even pear all work well alongside rhubarb, and each brings a different balance of sweetness to the finished pudding.

What is Delia Smith rhubarb crumble ice cream?

Delia Smith rhubarb crumble ice cream refers to a dessert idea that combines the flavours of rhubarb crumble with creamy ice cream. The tart rhubarb and sweet crumble topping pair particularly well with vanilla ice cream.

How to Choose the Best Rhubarb?

Choose firm, fresh-looking stalks with a bright colour and no obvious signs of wilting. Thin stalks are often more tender, while thicker outdoor rhubarb can have a stronger, sharper flavour.

Always remove and discard the leaves, as they should not be eaten. Trim the ends, wash the stalks and cut them into even pieces. Forced rhubarb is usually more tender and delicate, while outdoor rhubarb tends to be thicker and more robust.

Should You Cook Rhubarb Before Making Crumble?

For this crumble, there is no need to fully cook the rhubarb beforehand. Cut it into even pieces, then combine it with the sugar and a small amount of liquid before adding the crumble topping.

The oven does the cooking, leaving the rhubarb tender while helping it retain some texture rather than becoming completely soft.

How to Get a Perfectly Crisp Crumble Topping

Use cold butter and rub it into the flour until the mixture resembles coarse breadcrumbs. Stir in the sugar without overworking the mixture, then scatter the topping loosely over the rhubarb.

Avoid pressing it down, as a light, uneven layer helps the crumble become golden and crisp while the fruit cooks underneath.

Final Thoughts

There’s a reason rhubarb crumble has stayed a fixture of British home cooking for so long — it’s genuinely hard to get wrong once you understand the basic principles behind it. Keep the butter cold, don’t compact the topping, and let the rhubarb do most of the flavour work.

Made this way, it’s the kind of pudding you can pull together on a weeknight with ingredients you probably already have, and it holds up just as well served at a proper family lunch. Serve it warm, add a jug of custard, and it rarely lasts long on the table.