Getting smooth buttercream frosting takes a bit of trial and error but it’s obtainable! When I first started making buttercream I got all sorts of textures. Here is my recipe for a classic vanilla buttercream frosting.
1 cup unsalted butter, softened
1 - 1 1/2 cup icing sugar
1 tsp pure vanilla extract
Beat the butter with a stand mixer and paddle attachment. Beat until it’s smooth.
Add in the sugar, 1/2 cup at a time and keep mixing.
Add the vanilla extract and continue to mix.
Keep beating until the buttercream is lighter and fluffy.
Q - My buttercream is too runny, how can I fix it?
A - Your butter could be melted and in this case, let it cool a bit to firm up, either on the counter or in the fridge.
Q - My buttercream is too stiff, how can I fix it? A - Too much icing sugar might cause your buttercream to be stiff, you will need to had more softened butter. Or your buttercream frosting is formed up and you will need to beat it to soften it.