Help! Fudges are sugary and keeps boiling over

[exqfinecandy]

Hi,
i have a candy business and we make over 75 different flavors of fudge. SOMETIMES, only sometimes, my fudge bases will start boiling over. When we use a mixer the boiling over problem gets worse. Also lately we have noticed that our fudges are coming out a little sugary. We do not know if it is because we scrape the pitcher too much or not enough. We do know the sugaring isnt because the fudge is getting to hot. It is not that kind of sugaring... it's more like some of the sugar crystals dont want to dissolve but the majority of the fudge is smooth.

Both of these problems are fairly new... so guess my questions are 1. How do I keep my fudge bases from overflowing? 2. Should I add lecithin or cream of tartar to my fudge base to help dissolve the sugar? if so, how much? Each batch of fudge makes 3 pounds.

some notes...
we are basically using the kraft fantastic fudge recipe
we use real butter, sugar and evaporated milk as our initial base
we are cooking in the microwave but mixing every 2.5 minutes
we use frozen butter and the overflow problem doesnt happen as often but still happens
we live in Oklahoma now where the humidity is crazy during the summer

Thanks!

[buonaboy]

Are you using a thermometer? Also, sugar is a crysal and it breaks down at a specific temperature. I don't make fudge, but when i make caremel, if you allow sugar crystals that form on the sides of your pan to fall into the desolved but not completely broken down syrup, it's ruined! I don't have my copy of "On Food And Cooking" by Harold Mcgee in front of me, but if you read through the chapters on sugar and chocolate he explains it best. That book made my custards perfect, my chocolate shiny and all my braised meats pink and tender in the middle- if you don't have it get. -it's explains all the things you already know from experience, scientificly. And will answer just about any food question you could dream up.
-cheers

[bughut]

Any time i make fudge, or our Scottish equivalent Tablet i use a pastry brush dipped in cold water to moisten the side of the pan as it cooks. This stops the crystalised sugar from falling back into the mix and elliminates the sugary result.
Works for me!

[greyeaglem]

Humdity can have a big effect on fudge for reasons I don't (not being a scientist) understand. If you always use the same ingredients and this is an intermittant problem, it might be an occasional equipment fluke. If you are using a candy kettle, I would wonder about the thermostat. Does it happen one day and then not for, say, six days; or is it bad for six days and then fine for awhile? Do you always use the same brand of sugar and is it cane sugar? Cane and beet sugar are not created equal and beet sugar is not generally used for candy making. I used to have problems with sugary fudge until I realized the pan I was using retained heat too long and when I would mix in marshmallow creme, chips and nuts, it would keep cooking and turn sugary. Now I put all that sruff in a bowl and then mix in the cooked part. Problem solved. (I was making essentially the same fudge you are.)