Mary Berry served up a easy to make apple crumble with plain flour and light muscovado sugar for AJ Adudu on Mary Berry Makes It Easy.
The ingredients are: 1.5kg cooking apples, peeled, cored and roughly chopped, 30g butter and 175g light muscovado sugar.
For the crumble topping: 175g plain flour, 115g butter, cut into cubes and 55g demerara sugar, plus a little extra to sprinkle.
See recipes by Mary in her book titled: Mary Makes it Easy: The new ultimate stress-free cookbook available from Amazon now.