When measuring flour, we spoon it into a dry measuring cup and level off excess. (Scooping directly from the bag compacts the flour, resulting in dry baked goods.) At the point where the crust is prebaked everything can be stored up to 2 days before baking. Refrigerate the caramel, apple filling and crumble in three separate airtight containers. Wrap the parbaked pie crust in plastic wrap and leave at room temperature.