Apple crumble tray bake Author: Jeroen Prep time: 30 mins Cook time: 50 mins Total time: 1 hour 20 mins Serves: 40 portions Ingredients Cake-base 500 gr soft butter 500 gr white sugar 10 eggs 500 gr pastry flour 16 gr baking powder Filling 1 kg apples 2 tbspn sugar 2 tbspn custard powder 1