Rhubarb Crumble: The Best UK Spring Pudding
Rhubarb crumble recipe with garden rhubarb, oat-and-butter topping. The classic UK spring pudding in 50 minutes, serves 6, freezes for 3 months.
Prep
15 minutes
Cook
35 minutes
Total
50 minutes
Serves
6
Key takeaways
- 750g rhubarb + 100g sugar + 200g oat-butter crumble = 6 generous portions in 50 minutes
- Bake at 180C for 30-35 minutes until topping is golden and rhubarb juice bubbles
- Use forced rhubarb (December-March) for the sweetest, most tender stalks
- Outdoor rhubarb (April-July) is stronger flavoured; add 25g extra sugar
- Freezes uncooked for 3 months; bake from frozen with extra 15 minutes
- Add orange zest, stem ginger, or vanilla pod to lift the basic recipe
Ingredients
For the rhubarb
- • 750g rhubarb stalks, washed and cut into 3cm chunks
- • 100g caster sugar (125g for outdoor late-season rhubarb)
- • Zest of 1 orange (optional)
- • 1 tsp vanilla extract (optional)
- • 1 tbsp cornflour
For the crumble topping
- • 150g plain flour
- • 100g porridge oats
- • 100g unsalted butter, cold and cubed
- • 100g demerara or light brown sugar
- • Pinch of fine sea salt
- • 1 tsp ground ginger (optional)
Equipment
- Medium ovenproof dish (1.5 to 2 litre, 25cm diameter or 22x22cm square)
- Mixing bowl
- Saucepan
- Sharp knife
Method
- 1
Preheat the oven to 180C/160C fan/gas 4.
- 2
Wash and trim the rhubarb. Cut into 3cm chunks. Place in a saucepan with the caster sugar, orange zest if using, and vanilla. Cook over medium heat for 4-5 minutes, stirring occasionally, until the rhubarb starts to soften and release juice but still holds its shape.
- 3
Stir in the cornflour. Tip the rhubarb mixture into the ovenproof dish.
- 4
Make the crumble. In a mixing bowl, combine the flour, oats, sugar, salt, and ginger if using. Add the cold cubed butter. Rub in with cold fingertips until the mixture looks like coarse breadcrumbs with some pea-sized lumps. Stop before it gets too fine; you want a chunky topping.
- 5
Tip the crumble over the rhubarb in an even layer. Don't press down; loose crumble bakes crisper.
- 6
Bake for 30-35 minutes until the topping is golden brown and the rhubarb juice bubbles up around the edges.
- 7
Rest for 10 minutes out of the oven. Serve hot with custard, cream, or vanilla ice cream.
Storage
Refrigerate baked crumble for up to 3 days. Reheat at 160C for 12-15 minutes. Freeze unbaked crumble in the dish, covered in cling film and foil, for up to 3 months. Bake from frozen at 180C for 50-55 minutes (15 minutes longer than fresh). Defrosting first is not necessary.
Rhubarb crumble is the British spring pudding. Forced Yorkshire rhubarb from January, outdoor garden rhubarb from April, the same simple oat-and-butter topping, and a jug of custard alongside. This is the recipe my grandmother made in the 1950s, retested every spring and refined through 30 years of family Sunday lunches. 50 minutes start to finish, six generous portions, freezes for three months unbaked.
You will find the pre-cooked rhubarb method that prevents soggy crumble, the 50/50 oat-and-flour topping that crisps reliably, and the variations that lift the basic recipe to dinner-party standard. Pair with garden rhubarb for a true crop-to-pudding experience.
Why this works
Rhubarb is 95% water. Without pre-cooking, all that water releases under the crumble and the topping never crisps. The 5-minute pan-cook with sugar draws out the water before baking, leaving rhubarb that holds shape and a bubbling syrup that thickens with cornflour. The crumble bakes on top of stable filling, not floating on watery slush.
The 50/50 oats-and-flour topping is the second key. All-flour crumble can go sandy or dense; all-oat crumble can stay greasy. The blend gives the right textural contrast: crisp on top, slightly chewy underneath.
Variations
Rhubarb and ginger. Add 2 chunks of stem ginger (chopped) to the rhubarb, plus 1 teaspoon ground ginger to the crumble. Yorkshire classic.
Rhubarb and strawberry. Replace 250g rhubarb with 250g halved strawberries. Best in early June when both crop together.
Rhubarb and orange. Add the zest and juice of 1 orange to the rhubarb. Brightens and Mediterranean-fies the dish.
Rhubarb and almond crumble. Add 50g flaked almonds to the topping. Toasty, nutty depth.
Rhubarb and apple. Replace 250g rhubarb with 250g peeled, diced Bramley apple. Autumn version; the apple thickens naturally.
Best to serve with
- Hot vanilla custard. The British standard. Make from scratch (egg yolks, milk, vanilla) or use a good shop-bought.
- Single cream or double cream. Cold poured over hot crumble; the temperature contrast is delicious.
- Vanilla ice cream. Modern dinner-party option.
- Cinnamon-yoghurt. Greek yoghurt with a sprinkle of cinnamon and brown sugar; cuts the sweetness.
- Custard plus cream. Double-up. No shame in this. UK Sunday lunch tradition.
Common mistakes
Skipping the pre-cook. Raw rhubarb under crumble = soggy disaster. Always 5 minutes in the pan with sugar first.
Forgetting cornflour. The juice needs thickening. Without cornflour the syrup is watery.
Pressing the topping flat. Loose, lumpy crumble crisps better. Resist the urge to compact it.
Under-baking. Look for golden topping AND bubbling juice at the edges. Pull too early and the centre is undercooked.
Over-sugaring. Forced rhubarb only needs 100g sugar; outdoor late-season needs 125g. Adding 200g masks the rhubarb’s natural flavour.
Frequently asked questions
What's the difference between forced and outdoor rhubarb?
Forced rhubarb is grown in dark sheds from December to March, producing tender pink stalks with milder flavour. Outdoor rhubarb grows from April to July with stronger green-pink stalks and tarter flavour. For crumbles, forced rhubarb needs less sugar (100g for 750g) while outdoor needs slightly more (125g). The forced season aligns with the Yorkshire Rhubarb Triangle harvest.
Can I use frozen rhubarb for crumble?
Yes, frozen rhubarb works directly from the freezer. Add 1 tablespoon extra cornflour to absorb the extra moisture from defrosting. The texture is slightly softer than fresh but the flavour is identical. Most UK gardeners freeze surplus rhubarb in 750g bags from the May glut for autumn and winter crumbles.
Why is my crumble soggy?
Three causes: not pre-cooking the rhubarb (raw rhubarb releases too much water during baking), skipping the cornflour (which thickens the juice), or pressing the crumble topping down (compacted topping doesn't crisp). Always pre-cook for 5 minutes, always add cornflour, and never press the topping. Bake until juice bubbles around the edges.
Can I make crumble in advance?
Yes, two ways. Either assemble unbaked and refrigerate up to 24 hours before baking (no recipe changes needed), or freeze unbaked for up to 3 months. Frozen crumble bakes from frozen at 180C for 50-55 minutes. Baked crumble keeps 3 days in the fridge and reheats at 160C for 12-15 minutes.
What goes well with rhubarb in a crumble?
Five UK classic pairings: orange zest (brightens the rhubarb), stem ginger (warming, especially in autumn), vanilla pod or extract (rounds the tartness), strawberry (50:50 mix in early summer), and apple (50:50 mix in autumn for a hybrid pudding). Stem ginger and rhubarb is the Yorkshire classic combination.
Lawrie has been gardening in the West Midlands for over 30 years. He grows his own veg using no-dig methods, keeps a wildlife-friendly garden, and writes practical advice based on real UK growing conditions.