One of the very first recipes I remember making was the little jam biscuits from Kids First Cookery Book which served as my excuse to make a mess of my mum’s kitchen. Perhaps it paid off in the end but either way the inspiration for these Jam Crumble Shortbread Bars were certainly from those early jam tarts. A very satisfying bake, in that the base and the crumble topping are made from the same dough. Switch up the jam as you wish and feel free to swap with whatever seasonal fruits you fancy.