Mascarpone cheese is similar so it might work too. Overall, this is a terrific low carb chocolate buttercream frosting for any cake. It could easily pass as a real sugar frosting. It’s a moist low carb gluten free chocolate cake made with coconut flour.
German Buttercream frosting uses butter and a rich, yet simple vanilla custard to create a silky, melt-in-your mouth frosting perfect for sheet cakes and cupcakes. Marta Rivera If you're not a fan of overly sweet buttercream, this vanilla-flavored frosting just may become your new bestie.
There are two "optimal times" to flavor German buttercream: before cooking the custard or after the custard has thickened. You can infuse the milk before combining it with sugar and cornstarch. Once the milk begins to steam (reaches a temp between 120°F-140°F), turn off the heat and allow the infusions to steep in the milk for 20 minutes.
Over the years, cream cheese has become the go-to base for low-carb frostings, but cream cheese tends to create a thick and heavy frosting. While still delicious, sometimes it’s nice to have a light frosting that offsets a rich and heavy cake.