You could try cutting back on your chocolate intake by say gradually reducing the amount you eat, say for example cut down from 6/7 biscuits for say 5 each day then a few days later cut down to 4 and so on to gradually get your body accustomed or change the choc bar to a mini size one. Also may help if instead of eating the majority of your chocolate at once spread it over the course of the day, i.e two biscuits with tea at lunch an maybe 2 again after your dinner. that should help your sugar levels stay consistent throughtout the day an help reduce ur cravings. Hope this is useful