Preheat the oven to 180°C (160 fan/ Gas 4).
Make the crumble topping by placing the flour, oats, and brown sugar in a large bowl.
125 g Plain Flour, 125 g Rolled Oats, 150 g Light Brown Sugar
Mix in the melted butter. Stir with a metal spoon until crumbles form.
125 g Butter
Put the peeled and sliced apples, blackcurrants, and caster sugar in a large baking dish (approximately 2 litres) and give it a gentle mix.
750 g Bramley Apples, 300 g Blackcurrants, 60 g Caster Sugar
Spoon the crumble over the fruit and bake in the oven for 45-50 minutes until golden brown, and the fruit is bubbling underneath.