Apple Crumble for Two. This delicious yet easy apple crumble for two is perfect for sharing with your sweetheart. Serve with custard, thick cream or scoops of vanilla ice-cream! It’s also easy to double or triple if you want to share the love with many. Recipe is easily doubled or tripled, just make sure to use a suitably sized dish for the amount. Larger crumbles may need an extra 5 minutes of baking. To test, use a sharp knife to pierce a piece of apple in the middle of the crumble, if it passes through easily, it’s ready.