I have 100g low fat vanilla ice cream topped with half a bag of crushed maltesers as a dessert for 11.5 syns. It's yummy and not to small a portion.
Alpen light double chocolate bars do actually hit the spot for a chocolate craving, and you can have two as a Healthy B, making one bar just 3 syns. I take them to work, so when my coworkers have stuff from the vending machine, I have one of those! Yum!