I'm making an ice cream cake for my brothers birthday. I was putting the ice cream on the first layer of cake and put it in the freezer. I couldn't finish putting the icecream on because it was melting, I tried putting more ice cream on it 15 minutes later but it was melting all over the place. I put it in the freezer again. I think at the beginning my ice cream was way too soft. How do I fix this?? Any help will be appreciated! Thanks.