In this house, we love a sugar-free, low-carb dessert. I mean, really who doesn't. We've been making these mousse cups since they first showed up on the web a few years back. I think it was when keto became all the rage. No one in our house is following the keto diet but we do love this Sugar-Free Pistachio Mousse. It's beyond easy to make, has a perfect velvety texture and is downright delish!