Ruby, we've done a series of log posts on sugar substitutes, but they were long ago. At some point we'll hopefully update them, but for now, we're looking at reducing sugar, rather than substituting. As for "mug cookies" - here's what I do. I make a batch of cookie dough, scoop it into balls, freeze them on a baking sheet, then put them in a bag and store in the freezer. When I want a couple or several cookies, I take however many I want out of the freezer, let them thaw very briefly (maybe 10 minutes), then bake them in my toaster oven. SO much easier than trying to make a tiny little batch of cookie dough. Of course, you can also make an entire batch of cookies and freeze most of them, then when you want one, take it out of the freezer and microwave VERY briefly, just to warm it up. You'll think you're enjoying an oven-fresh cookie! PJH

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