Preheat oven to 350 degrees and add cupcake liners to muffin pan.
Using electric mixer, cream the butter and sugar until well mixed. Add all other ingredients and beat until combined and smooth.
Spoon batter into prepared cupcake liners.
Bake for 20 - 25 minutes or until a knife inserted comes out clean.
Buttercream Decorator's Icing
Using an electric mixer, beat the butter until softened. Add the milk, vanilla and salt. Slowly mix in the confectioners sugar until well combined. The mix will be stiff.
If desired, mix in a few drops of food coloring until combined.
Notes
To color the icing for piping hydrangeas, we divided our icing mix into four different bowls. We left one white and used blue, purple, and pink food coloring for the others.