29 June 2026

Simple Apple Crumble with Oat and Nut Topping

By James Whitaker
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Simple Apple Crumble with Oat and Nut Topping

Why This Crumble Deserves a Permanent Spot in Your Recipe File

A good apple crumble is one of the most forgiving puddings in British home cooking, and this version is built for the nights when you want something warm without a great deal of fuss. Soft, cinnamon-scented apples sit under a topping that is part rubble, part flapjack: plain flour for shortness, cold butter for flake, porridge oats for chew and a handful of nuts for crunch. It takes about fifteen minutes to assemble and forty minutes in the oven, and it will happily wait on the counter while you eat your roast.

The trick is balance. Bramley apples give the sharpness that stops the whole thing tasting like a sweet shop, while a spoonful of light brown sugar and a little cornflour keep the fruit tender rather than watery. Get those two things right and the topping almost looks after itself.

Choosing and Preparing the Apples

Bramleys are the classic choice and still the best if you want that distinct tang and fluffy collapse. If you only have eating apples, use a mixture of varieties rather than one, and add an extra squeeze of lemon to sharpen them up. Roughly 900g of prepared fruit fills a 23cm round dish or a 1.5-litre ovenproof dish comfortably, with enough room for a generous crumble layer.

Peel, core and cut the apples into chunks about 2cm across. Slices cook too quickly and turn to purée, while large wedges can stay crunchy in the middle. Toss them in a bowl with:

  • 60g light brown soft sugar
  • 1 heaped tsp ground cinnamon, plus a pinch of mixed spice if you like
  • 1 tbsp cornflour
  • The juice of half a lemon

Leave that to sit while you make the topping. The sugar draws out juice, which the cornflour will thicken into a glossy syrup rather than a puddle.

The Oat and Nut Topping

Work quickly and keep everything cold. Cold butter is what gives you a crumble rather than a paste, and warm hands undo good work in seconds. In a large bowl, combine:

  • 150g plain flour
  • 100g cold unsalted butter, cut into cubes
  • 75g porridge oats
  • 60g light brown soft sugar
  • 50g nuts — flaked almonds, chopped hazelnuts or walnuts all work well
  • A pinch of fine sea salt

Rub the butter into the flour with your fingertips until it looks like coarse breadcrumbs, with a few pea-sized lumps left in. Stir through the oats, sugar, nuts and salt. If you would rather not use your hands, pulse the flour and butter in a food processor a few times, then tip into a bowl and stir in the rest by hand — the oats and nuts should stay whole.

For extra depth, toast the nuts for five minutes in a dry pan first and let them cool completely before adding. It is a small step that makes a noticeable difference, particularly with hazelnuts.

Assembling and Baking

Tip the apples and their juices into the dish and level the top. Scatter the crumble over in an even layer, then press very lightly with the back of a spoon — just enough to settle it, not enough to compact it. Loose patches are fine and will crisp up beautifully. For a deeper golden finish, sprinkle over a tablespoon of demerara sugar.

Bake at 190°C fan (210°C conventional, gas mark 6) for 35 to 40 minutes, until the fruit bubbles up at the edges and the topping is deep gold. If the nuts start to catch before the apples are tender, cover loosely with foil and give it another ten minutes. Let it stand for 10 to 15 minutes before serving — the filling thickens as it cools and you avoid burning your mouth on molten apple.

Serving, Storing and Making Ahead

Custard is the traditional partner, and homemade takes eight minutes: warm 500ml whole milk with a split vanilla pod, whisk into four egg yolks and 60g caster sugar, then stir over a low heat until it coats the back of a spoon. If you are short on time, a good shop-bought custard is entirely respectable. Alternatives worth trying are clotted cream, a scoop of vanilla ice cream, or a spoonful of Greek yoghurt with a drizzle of honey for something lighter.

The assembled crumble can be covered and chilled for up to 24 hours before baking — add five minutes to the cooking time. Baked leftovers keep for three days in the fridge; reheat in a moderate oven for 15 minutes to bring the topping back to life. A quick blast under the grill works too, but watch it closely. Freezing works best before baking: wrap the dish well, freeze for up to three months, and bake from frozen at 180°C fan for about an hour.

Easy Variations Worth Knowing

  • Pear and ginger: swap half the apples for firm pears and add 2 tbsp chopped stem ginger.
  • Blackberry season: fold 150g blackberries through the apples in late summer — they cut the sweetness beautifully.
  • Nut-free: replace the nuts with an extra 50g oats and a tablespoon of sunflower seeds.
  • Extra flapjacky: add 2 tbsp golden syrup to the melted butter if you melt it rather than rub it in, and stir through the dry mix.

Serve it warm, straight from the dish, with the custard jug on the table. It is the kind of pudding that suits a Sunday, a wet Wednesday, or any evening when something simple and generous is exactly what is called for.