Originally Posted by goodgiver
I know that this must be here somewhere but I sure can't find it. My question is can a person freeze dry yeast, the kind that come 3 to a package?
As long as the packages are not opened you don't need to freeze them. After all, they just sit on the shelf in the store, and not in the cold or freezer storage areas of the store. That being said, if you open your yeast package, you can keep it in a sealed jar in the refrigerator. I buy Instant yeast in a 1 lb vacuum sealed package, then put into small sealed jars in the freezer. I usually have 2-4 oz in a sealed jar in the fridge at all times for my baking needs, and pull one from the freezer when I need another one. It will keep for 12-18 months in the freezer with no problem.
If you doubt the viability of your stored active dry yeast, just put it in some warm water with a teaspoon of sugar and a pinch of salt, and it should develop a froth in about 10 minutes or so. If it froths it's fine and just put it in your recipe. If it does not froth, pitch it and go buy some fresh stuff. Instant Yeast does not require this proofing step, as you just put it in with your dry ingredients. It has a much higher concentration of live spores than active dry yeast, and a longer shelf life.