Combine all ingredients into a stand mixer bowl and mix on medium speed.
You could also use a hand mixer or mix with a fork.
Mix well for a couple of minutes or until the mixtures starts to look like thick soup.
Then add in the 1/2 cup icing sugar.
Continue to mix until icing is thick and stiff.
Divide icing into 3 bowls.
Add the red food coloring to one bowl, black into the second and leave the 3rd icing, white.
You are going to need 3 different piping bags with a number 2 tip.
Add each different color icing to a separate piping bag.
Lay a piece of parchment paper on a cookie sheet.
Take a blank sheet of paper and draw out the Ghostbuster symbol.
Place that sheet of paper under the parchment paper.
Take the black piping bag and outline the ghost.
Then take the piping bag filled with red icing, outline and fill in the red part like shown in the in process picture.
Then take the piping bag filled with white icing and use it to fill in the ghost.
Now that you have finished making the Ghostbusters image in icing, you need to let it air dry for 8-10 hrs or overnight.
Take the hardened icing image and place it onto freshly frosted cupcakes.
