I love baking but sometimes I just don't have it in me to measure out all the dry ingredients. So I've been thinking about putting together some pre-bagged baking mixes and that way, when I want to make, e.g., biscuits (as I am likely to want to do as shortcake season approaches!) I can just pull out the mix and add in my wet ingredients. Has anyone else done this? How long can I expect the mixes to remain good for (i.e. will they go stale)? Can I double up the recipes and make several batches of mix at once, or is it best to mix the ingredients for one recipe (i.e. one batch of biscuits, or loaf of cornbread) at a time? Are some recipes more conducive to this than others? Recipe suggestions? Thanks guys!