This buttercream frosting recipe makes a lot of frosting. If you're making a layer cake, follow the ingredients as listed. If you're icing up to 24 cupcakes or a 9x13 cake, we'd suggest cutting ...

Set aside to cool completely. For the lemon buttercream, beat the butter until soft and fluffly. Add the icing sugar slowly until completely combined, pale and fluffy. Stir in the lemon extract.