Apple & Blackberry Crumble

Directions

1. Heat the oven.
   Preheat to 190°C (170°C fan/gas 5). You want a fully hot oven before the crumble topping goes in. If the oven is still warming up, the butter melts instead of crisping, and you’ll get greasy crumbs.
2. Make the crumble topping.
   Tip the flour and caster sugar into a large bowl. Add the cold butter and rub it in with your fingertips until it looks like light breadcrumbs.
   It should feel dry and loose, not clumpy. If it starts forming a dough, you’ve overworked it. Stop immediately — spread it out and let it cool for a minute before continuing.
3. Pre-bake the topping.
   Sprinkle the crumble evenly over a baking sheet and bake for about 15 minutes until lightly golden.
   Don’t wait for it to go dark brown — it will finish cooking later. Overbaking here leads to a bitter, sandy topping.
4. Start the fruit base.
   Put the butter and demerara sugar into a medium saucepan over medium heat. Let it melt and bubble gently for about 3 minutes until it turns a light caramel colour.
   If it smells burnt or goes dark fast, your heat is too high. Take it off, wipe the pan, and start again — burnt sugar will ruin everything.
5. Cook the apples.
   Add the diced apples and cook for 3 minutes, stirring gently. They should start to soften but still hold their shape.
   If they release a lot of liquid, your apples are very juicy — just keep cooking uncovered for another minute to let excess moisture evaporate.
6. Add blackberries and spice.
   Stir in the blackberries and cinnamon. Cook for another 3 minutes. The blackberries should burst slightly but not completely collapse.
   Too much stirring here turns the fruit into jam. Gentle folding is enough.
7. Rest the fruit.
   Cover the pan, remove from heat, and let it sit for 2–3 minutes. The residual heat finishes cooking without turning everything soft.
8. Assemble and reheat.
   Spoon the warm fruit into an ovenproof gratin dish. Scatter the pre-baked crumble evenly over the top. Reheat in the oven for 5–10 minutes until the topping is hot and crisp again.
   If the topping looks pale, give it a final 2 minutes under the grill — but watch it closely.
9. Serve.
   Serve immediately, ideally with vanilla ice cream. Cold ice cream against hot crumble is not optional — it’s the point.