My LO will only take a few bites of ice cream or frozen yogurt.
The first time she stopped eating REALLY GOOD ice cream after a few bites I was shocked.

We went to get frozen yogurt today and I think she had 5 small spoonfuls of it before throwing her spoon away.

We usually let her try everything we eat, so maybe she doesn't feel like sweets are something special that she needs to eat a lot of when given the chance?