Melt butter 30 seconds in microwave, using a plastic mixing bowl

Add powdered sugar to mixing bowl

Slowly mix, low speed at first

Add eggs, vanilla

Mix very well

Serve or be fun and do colors. If you want a multitude of colors, spoon small amount of Frosting in separate bowls, a bowl for each color. Just make sure that you have equal amounts or you will run out of a color quicker

If desired a thinner Frosting, do a couple drops of milk at a time to get your desired thickness