6tbsppastured butter(This is a slightly yellow buttercream frosting. For a whiter frosting you'll want to use ½ cup sustainably harvested palm shortening but although the palm version is pictured my kids ended up really preferring the butter flavor)
Combine all ingredients except the optional food dye in a bowl and mix using a fork (or hand mixer) until well-combined.
Add optional food dye until the desired color is reached. The dye tends to thin out the frosting a bit and make it more spreadable. If not using food dye, add a bit more butter or palm shortening until desired consistency is reached.