Ingredients For the apple crumble. Apple crumble with custard. 100g/3½oz unsalted butter; ½ tsp ground ginger; 1 Bramley apple, peeled, cored and finely chopped; 2 tsp caster sugar; 100g/3½oz plain flour; 100g/3½oz brown sugar; For the custard. By admin December 15, 2019 December 15, 2019 apple, crumble, custard, letterA.