Russian buttercream is a type of buttercream that uses sweetened condensed milk as a sweetener. This means there is no powdered sugar in the frosting like in American buttercream, and no granulated sugar like in a meringue buttercream. Its consistency is super smooth and glossy, it pipes like a dream and tastes delicious without being too sweet. It tastes like a cross between American Buttercream and Swiss Meringue Buttercream.