2Granny Smith apples, peeled and cut into 2cm cubes, see notes
250gblackberries, fresh or frozen
2tablespoonswhite sugar
¼teaspooncinnamon
For the Crumble Topping
160gplain flour
115gunsalted butter, chilled, see notes
80gbrown sugar
Instructions
Preheat the oven to 200°C/400°F (180°C fan)
For the Blackberry & Apple Filling
Peel and core the apples and roughly cut them into 2cm cubes. Place them in a medium-sized baking dish, then add the blackberries, sugar, and cinnamon. Toss to combine.
For the Crumble Topping
Weigh the flour, chilled butter and sugar into the Thermomix bowl and mix for 15-25 sec/speed 5. (It should look like sand, but be careful not to overmix, or it will become pastry!)
To Assemble
Tip the crumble topping evenly over the blackberry and apple filling and press down gently with the back of a fork. Don't be afraid to pile it high as the fruit shrinks down as it cooks.
Bake in the oven for 35-40 minutes until golden brown and the blackberries and apples are bubbling from the sides.
Serve immediately with piping hot custard or a scoop of vanilla ice cream.
Notes
Apples: Granny Smith is the perfect choice - they're tart and hold their shape well during baking. Other apples will work but may go mushy. Cut into even 2cm cubes so they cook through evenly.Butter: Your butter must be straight from the fridge - if it's soft, you'll get pastry, not breadcrumbs.Variations: You can also make individual portions in ramekins, just reduce the baking time and keep an eye on them.Storage: Allow to cool completely, then cover and refrigerate for up to 3 days. To make ahead, prepare the filling and topping separately, cover and refrigerate both, then assemble just before baking.