Easiest Buttercream Frosting. IF you go too far you then can add more icing. Let the sugar fully incorporate before adding in more sugar.
Then you can add a little bit of cream a little at a time until you reach the desired consistency. Add sifted confectioners sugar and stir on low until incorporated. To start beat in the icing sugar and see what the thickness of the frosting is.
Beat the butter and sugar together until combined.
Add the vanilla extract. Vanilla extract is an obvious addition to buttercream but its so easy to flavor with all sorts of extracts and add-ins. IF you go too far you then can add more icing. Add the vanilla extract.