Place apples and blackberries in a baking dish.Add sugar and lemon juice and vanilla. Toss lightly.
2. Make crumble
Rub butter into flour until it resembles coarse crumbs.Stir in sugar.
3. Assemble
Scatter crumble evenly over fruit.Do not press down.
4. Bake
Bake at 180°C for 35–40 minutes→ until golden and bubbling
5. Rest
Let sit for 5–10 minutes before serving.
👨🍳 Notes
Use firm apples for structureKeep crumble looseFruit should bubble, not flood
👨🍳 Kook’s Note
You don’t improve classics by adding more.You improve them by getting them right.Why use light brown sugar?It adds a subtle caramel depth while helping control how much juice the fruit releases — giving you a thicker, better-set filling instead of a watery base.