This makes a FANTASTIC keto dessert! Just use a powdered sugar-free sweetener – there are several brands. I use monk fruit-erythritol blended sweeteners for this and I love the result! The only difference I notice is that the powdered sugar substitutes don’t always sift well. For instance, some sifters create friction that rolls some of the powder into little balls. Kind of weird. But I manually bust those balls (fun!) and then add to the cream. I was rewarded with a deliciously smooth, sugar-free mousse!