How to Make Rhubarb Crumble: A Classic Step-by-Step Guide

Rhubarb crumble is a traditional British dessert that pairs sharp, tender rhubarb with a sweet, buttery crumble topping. It’s simple to make, comforting, and perfect served with custard, cream, or ice cream.

This guide explains how to make rhubarb crumble, from preparing the fruit to baking it perfectly

⭐ Recommended Products — 🌱 Rhubarb & Growing Essentials

Rhubarb is a hardy, productive perennial that’s great for desserts, compotes, and early spring harvests. These essentials will help you grow it successfully and enjoy its harvest year after year.

• Rhubarb Crowns / Plants
Established rhubarb crowns are the easiest way to start — strong plants ready to go in the ground or large containers. Look for reliable varieties like Victoria or Crimson King.
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• Rhubarb Forcers
Special covers used in early spring to ‘force’ tender, pale stems sooner than usual — perfect if you want early harvests and sweeter stalks.
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• Rhubarb Seeds & Starter Kits
If you prefer growing from seed, seed packs with quality varieties give you a head start — ideal for sowing under cover before transplanting later.
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• Garden Compost / Soil Improver for Rhubarb
Rich, well-drained compost or well-rotted manure helps rhubarb establish strong roots and produce big, healthy stems year after year.
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• Rhubarb Growing Guide & Plant Care Book
A helpful reference on planting, forcing, feeding, and harvesting — great for beginners or anyone wanting bigger yields.
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🍓 What Is Rhubarb Crumble?

Rhubarb crumble is a baked dessert made by:

• Softening rhubarb with sugar
• Topping it with a crumbly mixture of flour, butter, and sugar
• Baking until golden and bubbling

It’s best served warm and freshly baked.

🧈 Ingredients for Rhubarb Crumble

Rhubarb Filling

• Fresh rhubarb stalks
• Caster or granulated sugar
• Cornflour (optional, for thickening)

Crumble Topping

• Plain flour
• Unsalted butter, cold and cubed
• Sugar (caster, granulated, or light brown)

Optional additions:

• Oats
• Ground almonds
• Cinnamon or ginger

🥣 How to Make Rhubarb Crumble

1️⃣ Prepare the Rhubarb

• Wash and trim the rhubarb
• Cut into 3–4cm (1–1½ inch) pieces
• Place in an ovenproof dish
• Sprinkle with sugar and cornflour (if using)
• Toss gently to coat

2️⃣ Make the Crumble Topping

• Place flour in a bowl
• Rub in the butter using fingertips until breadcrumb-like
• Stir in the sugar (and any optional extras)

The mixture should be loose and crumbly, not doughy.

3️⃣ Assemble the Crumble

• Spread the crumble topping evenly over the rhubarb
• Do not press it down

This allows the topping to crisp properly.

4️⃣ Bake

• Bake at 190°C (170°C fan)
• For 35–45 minutes, until golden and bubbling

If the top browns too quickly, cover loosely with foil.

5️⃣ Rest and Serve

• Leave to stand for 5–10 minutes
• Serve warm

🍮 What to Serve with Rhubarb Crumble

Rhubarb crumble is traditionally served with:

• Hot custard
• Pouring cream
• Vanilla ice cream

🔥 Tips for the Best Rhubarb Crumble

• Use enough sugar to balance rhubarb’s sharpness
• Don’t overwork the crumble mixture
• Add oats or nuts for extra texture
• Keep butter cold for a better crumble
• Let the crumble rest before serving

🌿 Easy Variations

• Rhubarb and apple crumble – replace half the rhubarb with apple
• Rhubarb and ginger crumble – add ground or stem ginger
• Oaty crumble – add rolled oats
• Almond crumble – add ground or flaked almonds

🌿 Final Thoughts

Rhubarb crumble is a simple, timeless dessert that makes the most of seasonal rhubarb. With minimal ingredients and straightforward steps, it’s an easy bake that delivers big comfort and flavour.

A true British classic.