This is a small batch apple crumble — a recipe that serves four and sits firmly in the category of puddings that need no improvement, no reinvention and no clever additions. A simple stewed apple filling made with cooking apples, caster sugar (superfine sugar) and water, topped with a buttery, golden crumble of plain flour (all-purpose flour), sugar and butter, baked until crisp and deeply golden on top. No oats, no spices, no embellishment of any kind. Just the three things that make a crumble a crumble, done as well as they can possibly be done. It is part of the Small Batch Bakes series — the fourteenth recipe in the collection — and it is best served warm from the oven with a generous pour of homemade vanilla custard.

Why I Created This Recipe

I make no secret of my love for apple crumble, or my very particular requirements for what makes one perfect. For me, the answer is always simplicity. No oats in the crumble (I know that is a divisive opinion) but I stand by it. No cinnamon, no nutmeg, no brown sugar. Just flour, caster sugar (superfine sugar) and cold butter, rubbed together until the mixture looks like sand, pressed down in a thick layer over a tender apple filling and baked until golden and crisp on top.

It is nostalgic in the best possible way, reminiscent of school dinners, which, contrary to what most people in the UK will tell you about theirs, were something I genuinely looked forward to. There is something about the combination of a slightly chewy, slightly crisp crumble top and a soft, lightly sweetened apple filling that is one of the great simple pleasures in British cooking, and I wanted to make a version that captures that feeling exactly, just in a smaller batch!

The mandatory accompaniment, by the way, is custard. Homemade sounds like extra effort, but I promise you it is not! The homemade vanilla custard recipe is one of the simplest things on the blog and it transforms this pudding from very good to completely extraordinary.

About the Small Batch Bakes Series

Small Batch Bakes is a series dedicated to baking in smaller quantities — recipes that produce a more manageable yield without compromising on quality, texture or flavour. This apple crumble is the fourteenth recipe in the series, and like all Small Batch Bakes it is designed to give you something genuinely special without the commitment of a full-sized batch that feeds a crowd.

Why This Crumble Works — The Two-Layer Technique

Most crumble recipes tell you to simply scatter the topping over the fruit and bake. This recipe does something slightly different, and it makes a noticeable difference to the finished texture.

The crumble topping is added in two stages. Two thirds of the mixture goes on first, pressed down gently with your fingertips to compact it slightly — this creates a denser, slightly chewier layer underneath that holds its structure during baking and gives the crumble its satisfying thickness. The remaining third is scattered loosely on top without any pressing, which stays lighter and more crumbly during baking, giving you those irregular golden pebbles on the surface that catch the heat and turn deeply crisp.

The result is a crumble with two distinct textures — a denser, almost biscuity layer underneath and a loose, crisp, golden top — which is far more interesting to eat than a uniformly crumbly topping throughout.

The Crumble Ratio — Why It Works

A good crumble topping comes down to ratio, and this one follows a simple, reliable formula that is worth knowing by heart: three parts flour to two parts butter to one part sugar. In this recipe that translates to 160g of plain flour (all-purpose flour), 120g of butter and 80g of caster sugar (superfine sugar) — but the beauty of understanding it as a ratio rather than a fixed recipe is that you can scale it up or down freely without having to look anything up.

The flour provides the structure and the sandy, crumbly texture; the butter binds it together and gives it richness, flavour and that golden colour in the oven; and the sugar sweetens it and helps it caramelise to a crisp, golden finish. Too much butter and the topping becomes greasy and dense; too little and it turns dusty and dry. Too much sugar and it can catch and burn before the crumble has had time to cook through. The 3:2:1 ratio keeps everything in balance — and once you know it, you will never need to look up a crumble recipe again.

Why You'll Want to Make This Recipe

Simple, Nostalgic and Deeply Comforting

This is a crumble that does not try to be anything other than exactly what it is — a classic British pudding made with the best possible ingredients in the simplest possible way. No unnecessary additions, no clever twists. Just a very good crumble, done properly.

Small Batch, Big Flavour

Serving four rather than eight or ten, this is a small batch recipe that gives you enough for a pudding for the week without the commitment of a full-sized dish. It keeps well and reheats beautifully — genuinely useful for solo cooks who want something special in the fridge without an overwhelming quantity.

A Foolproof Method

There is no specialist equipment, no complex technique and very little that can go wrong. The apple filling takes five minutes on the hob; the crumble topping takes five minutes by hand. The oven does the rest. This is one of the most approachable bakes on the blog.

Best Served With Homemade Custard

This crumble is good on its own. With the homemade vanilla custard poured generously over the top, it is something else entirely — the warm, silky custard seeping into the crumble top and pooling around the apple filling is one of the great simple pleasures. Do not skip the custard.

My Top Tips for the Perfect Apple Crumble

• Use cooking apples rather than eating apples. Cooking apples — Bramley is the classic British variety — have a higher water content and a sharper, more acidic flavour that softens and sweetens beautifully during stewing. Eating apples tend to hold their shape more and can taste flat and overly sweet once cooked. Bramley apples in particular collapse into a wonderfully tender, slightly fluffy filling that is exactly what you want beneath a crumble.
• The 400g of apple is the weight after peeling, coring and dicing — not before. Account for this when you are buying your apples; you will need around 500–550g of whole apples to get 400g of prepared fruit.
• Dice the apples into roughly 2cm pieces. Too small and they will collapse entirely during stewing; too large and they will not soften evenly. Aim for pieces that are roughly even in size for a consistent filling.
• Stew the apples until they have softened but still have some chunks remaining. You are not making apple sauce — you want a filling that has texture and body, with some pieces holding their shape and others collapsing slightly. Five minutes over a medium heat with frequent stirring is usually enough; remove from the heat as soon as you see that balance.
• Let the apple filling cool slightly before adding the crumble topping. A very hot filling can begin to melt the butter in the crumble before it goes in the oven, which affects the texture of the topping. Five minutes off the heat is enough.
• Use cold butter for the crumble. Cold butter rubbed into flour creates the irregular, sandy texture that makes a good crumble topping — warm or softened butter will make the mixture clump together too readily and produce a doughy rather than crumbly result. If your kitchen is warm, put the diced butter back in the fridge for five minutes before you start.
• Rub the butter in with your fingertips rather than your palms. Your palms are warmer and will melt the butter faster — use just your fingertips and work quickly. The mixture is ready when it looks like coarse, damp sand with no visible chunks of butter remaining, though a few slightly larger pieces are fine and will create a pleasingly uneven texture once baked.
• Press the first two thirds of the crumble down firmly. This is the layer that creates the denser, chewier base of the topping — it needs to be compacted enough to hold together during baking. Use your fingertips to press it into an even layer.
• Do not press the final third. Scatter it loosely over the top and spread it gently — this is the layer that stays light and crumbly, and pressing it will make it dense throughout. The contrast between the two layers is the point.
• Bake for the full 45–55 minutes. The crumble needs time to turn properly golden and crisp — it should be a deep, even golden brown across the entire surface, not just at the edges. If it is colouring too quickly, turn the oven down by 10°C and give it longer.

Ingredients and Tools You'll Need

For the Apple Filling

• 400g cooking apples, peeled, cored and diced into 2cm pieces – this is the prepared weight; you will need around 500–550g of whole apples. Bramley apples are the classic British choice and give the best flavour and texture
• 2 tbsp caster sugar (superfine sugar) – sweetens the filling without overwhelming the natural tartness of the apples
• 2 tbsp water – prevents the apples from catching in the pan during stewing

For the Crumble Topping

• 160g plain flour (all-purpose flour) – the base of the crumble; do not substitute with self-raising flour
• 80g caster sugar (superfine sugar) – gives the topping sweetness and helps it caramelise to a golden colour in the oven
• 120g butter, cold and diced – cold butter is essential for the right crumble texture; see the tips above

Essential Tools

• 1 small saucepan – for stewing the apples
• 1 baking dish, approximately 20x15cm – the size matters here; too large and the crumble will spread too thin, too small and it will be too deep to cook through evenly
• 1 large mixing bowl – for the crumble topping
• Wooden spoon or spatula – for stirring the apple filling

Storage & Make-Ahead

Storing the Crumble

Once baked and cooled, the crumble keeps well covered in the fridge for up to three days. The topping will soften slightly on the second and third day as it absorbs moisture from the filling — it will not be as crisp as it is fresh from the oven, but it is still completely delicious. You could also make this and freeze it prior to baking, then bake from frozen.

Reheating

Reheat individual portions in the oven at 180°C for 10–15 minutes until warmed through and the topping has crisped up again — this gives a much better result than the microwave, which tends to make the crumble topping soft and slightly soggy. The microwave works if you are in a hurry, but the oven is always preferable.

Freezing

The baked crumble freezes well — portion into individual servings, wrap tightly and freeze for up to three months. Defrost overnight in the fridge and reheat in the oven as above. The unbaked crumble topping also freezes beautifully on its own — make a double batch, freeze half in a sealed bag, and you have a crumble topping ready to go whenever you need it.

Making Ahead

The apple filling and the crumble topping can both be made a day in advance and stored separately in the fridge — the filling in a sealed container, the topping in a bowl covered with cling film (plastic wrap). Assemble and bake when you are ready. This is a particularly useful approach if you are making the crumble for a dinner party or a gathering and want to minimise the cooking on the day.

Dietary Variations

Gluten-Free

Substitute the plain flour (all-purpose flour) with a gluten-free plain flour blend — most supermarkets now stock a good quality version that works well in crumble toppings. The texture will be very slightly different but perfectly good. Ensure your baking dish and other equipment are free from cross-contamination if cooking for someone with coeliac disease.

Dairy-Free / Vegan

Replace the butter with a good quality dairy-free block butter — one with a similar fat content to dairy butter, rather than a low-fat spread. The crumble will work in the same way and produce a very similar result. The apple filling contains no dairy. Serve with a dairy-free custard or a scoop of dairy-free vanilla ice cream instead of the homemade vanilla custard.

Different Fruit Fillings

The crumble topping works beautifully with a wide range of fruit fillings. Rhubarb is a classic British alternative — use the same quantity and stew in the same way, adjusting the sugar to taste as rhubarb is considerably more tart than apple. A combination of apple and blackberry is another beloved pairing — use 300g of apple and 100g of blackberries, adding the blackberries raw to the dish alongside the stewed apple rather than cooking them on the hob. Pear, plum and gooseberry all work well too.

Frequently Asked Questions

Why is this called a small batch crumble if it serves four?

Small Batch Bakes is a series about baking in smaller, more manageable quantities than a standard full-sized recipe — not necessarily single portions. This crumble serves four, which is considerably smaller than a traditional crumble made in a large roasting dish that serves eight or more. For solo cooks, a batch of four servings is ideal — enough for pudding several nights running without an overwhelming quantity that goes to waste.

What is the best apple to use for apple crumble?

Bramley apples are the classic British cooking apple and give the best result here — they have a sharp, slightly tart flavour and a high water content that means they collapse beautifully during stewing into a tender, slightly fluffy filling. They are available in most UK supermarkets. If you cannot find Bramley, any sharp cooking apple will work. Eating apples can be used in a pinch but tend to hold their shape too much and taste sweeter and flatter once cooked.

Why do you add the crumble in two layers?

The two-layer technique creates two distinct textures in the finished crumble — a denser, slightly chewier layer underneath from the pressed-down first two thirds, and a loose, crisp, golden layer on top from the final third scattered without pressing. It is a small step that makes a significant difference to the finished texture and is one of the things that makes this crumble particularly good.

Can I add oats or spices to the crumble topping?

You can — but I would encourage you to try it exactly as written first. The simplicity of the topping is entirely deliberate, and the clean, buttery, golden flavour of a plain crumble topping is something that oats and spices, however delicious in their own right, genuinely alter. If you do want to add oats, replace around 30g of the flour with the same weight of rolled oats. For spice, a pinch of cinnamon stirred through the apple filling (not the topping) is the most restrained and effective way to add it.

What should I serve this with?

Custard, always! The homemade vanilla custard recipe is on the blog and is far simpler to make than you might expect. A scoop of good vanilla ice cream is the next best option. Pouring cream is also excellent if you want something simpler still. Whipped cream works but is the least traditional choice for a pudding this classic — it is better suited to something lighter.

Can I make the crumble topping by hand or do I need a food processor?

By hand, always. A food processor can overwork the mixture and produce a topping that is too fine and uniform — you want some variation in texture, with a few slightly larger pieces of butter creating uneven, golden pebbles in the finished crumble. Your fingertips give you far more control over the final texture than a machine, and the whole process takes less than five minutes.