This is just the classic recipe for seven minute icing. I have made it many times, successfully. There are only minor changes in this recipe from the one in the Better Homes and Gardens Cookbook. I doubt if any of these changes would make a difference in the outcome. This should make an excellent icing.
This was an awful gooey mess and wasn't worth all the effort and we followed the recipe exactly. The sugar never dissolved and it was a grainy marshmallow glue by the end. We ended up tossing it and just going for a straight buttercream for the Spice cake.