does turning on my heater have anything to do with my icing cracking. I use to have this problem and found out how to fix it (at least a way that worked for me) and then today I noticed the icing getting little hairline cracks on a wedding cake and the only thing that I can think of is that I kicked on my heater for the first time this season yesterday. Could this have something to do with it and what should I do to fix it? other then cutting off the heat and freezing to death haha thanks guys

I am no expert but it seems that in the winter (when the heat is on) my BC seems to crack. I am not sure if it is the heat drying the BC out or not. The only solution I could come up with is to add a little more liquid. I hope someone else comes along and offers more advice.

You both need to add a bit more fat (butter or Crisco) toyour recipe - especially in winter.
Most likely the heat is drying it out. You really don't want to thin the icing w/more liquid but make it creamier.

I have had some suggestions of adding some vinegar or maybe even some corn syrup, would this help and what does it do that helps? just curious

yes the heater can do it

try more fat, and a little vinegar or corn syrup

When you folks say "heater" ... do you mean the one in your car? Or are you talking about the furnace in your house?

I'm betting it's the heat in the house they are discussing. I noticed I had an issue with cracking if I let a cake sit overnight not in the fridge but boxed.

yes, it is the heater in my bakery. when you say add some vinegar or corn syrup, how much should I add and what is it doing to the icing that helps it? I am just curious

i use 2-3 tsp in my 5 quart batch of vinegar

never did corn syrup

but if heater is drying air a lot even the vinegar wont help