The best way I've found to prevent fudge from turning gritty (a direct result of the recrystallization of sugar) is to add 1/2 teaspoon cream of tartar for every 2.5 pounds of sugar used. Cream of tartar actually inhibits the sugar recrystallization process.
Follow all other instructions for the recipe. Add a cap of vanilla extract if you notice an odd aftertaste (not everybody is able to taste the cream of tartar).
Source: The French have been using this solution for ages to prevent the sugar from recrystallizing in fondant recipes. I tried it on fudge and it worked wonderfully.
By The Mad Rob from Martinez, CA
I have a large bag of cream of tarter that I purchased from a bulk store. I am looking for suggestions for other uses.
By Rose Smith from Malvern, PA
Hi From The Republic Of Ireland. If you see any recipe which requires baking powder such as Irish soda bread or Barm Brack ( great Irish delicacies ), use 2 parts cream of tartar to 1 part baking soda instead. A pinch in egg-whites make meringues better too.
These pages have some alternative uses for cream of tartar other than baking.
www.wisegeek.com/
www.ehow.com/
www.rd.com/
I have made cookies with cream of tartar and they had a great delicate airy type texture. This recipes sounds similar:
acraftylass.blogspot.com/
About adding to other recipes:
www.cookinglight.com/
Luckily it has an indefinite shelf life if kept from heat/light.
Make Homemade Playdough and put it in Halloween zip lock bags and hand out as treats to the kiddos. They will love it.
You can google homemade playdough recipes.
You can make some great Snickerdoodles cookies to pass out at Christmas.