I have been trying to make flapjack for ages, but every time I do I cannot get them to stick together after cooking, they always seem to crumble, so I end up with something more like muesli 
I have tried various different recipes but to no avail. What am I doing wrong? Can anyone please save me with a foolproof recipe? Healthy recipes would be good to add too (as obviously a mass of golden syrup and butter normally isn't, but dh loves them
), so ones for muesli bars would work too.