Place the Bakers Blue Label Marie Biscuit crumbs in a mixing bowl and sift in the flour. Stir in the sugar and with your fingers rub the butter into the dry ingredients. Set aside.
Chop the apples a little smaller and mix with the apple juice, ground cinnamon, castor sugar, lemon zest and sultanas. Place in a greased suitably-sized pie dish and sprinkle with the crumble.
Bake in the oven pre-heated to 200 oC for 15 – 20 minutes or until the crumble is golden brown.