To maximize the shelf life of crumble the crumble should be stored in an airtight, lightproof container, away from direct light and out of extreme temperatures.
Glass or silicone containers is ideal for the storing of crumble.
Fruit fillings that have been prepared with sugar can be safely left out at room temperature for up to two days.
Apple crisp falls into this category, so it doesn't need to be refrigerated if you're going to eat it within that time period.
Apple crisp will last 5 days in the refrigerator.
How do you keep crumble topping from getting soggy?
Butter, which encourages both browning and crispness, is the magic ingredient in getting your topping just right, so follow the recipe instructions.
But if you feel your topping is still too dry and crumbly, (even for a crumble,) add a bit more melted butter, a tablespoon at a time.
Apple Crumble also makes a great breakfast.
Either you can microwave it, which is our usual method, or you can cover with foil and reheat at 350°f / 180°c in the oven until warmed through.
Usually we tend to just warm up individual servings as needed though in the microwave.