Storage smarts: Once ripe, custard apples can be refrigerated for up to three days. Store in airtight containers for longer-lasting freshness. Once you take the fruit out of the fridge, let it sit for about five minutes before eating to get the best taste. Enjoy fresh: Serve a custard apple with shredded coconut and nuts on top of some cereal for a yummy breakfast. Or scoop out the flesh (discarding the skin and seeds) and pop into a blender with ice cream, milk and honey for a decadent smoothie. They are best eaten fresh, as the flavour can be dulled when you heat them.