I'm planning to make a batch of soft caramels. Whole milk makes up about half the recipe. Since I only have skim milk on hand, can I substitute skim milk for the whole milk?
You can but the result will be much thicker than that with the whole milk, and they won't taste as good due to the reduction of fat. You could add some oil or other fat to make up the diffrence, although that will most likely change the taste as well.
According to this site, you can substitute one cup of skim milk plus two teaspoons of melted butter for each cup of whole milk.