How do you make plain yogurt harden for the dog cookies?
Answer: The yogurt dog treat icing that we recommend is not the same as store yogurt that is found in the dairy case. If you are trying to use that as icing for dog cookies, it will not harden and all you will get is yogurt sitting on top of cookies.
Fido's Frosting is yogurt dog icing that dries hard. It is an all natural yogurt icing, but it is a powder that is mixed with water to create an icing for dog treats.