Allow butter to soften to room temperature.
Place butter into a mixing bowl. Use a mixer set on medium to beat it until the butter is light and fluffy. You want the butter to look smooth and fluffy.
Slowly mix in approximately 2.5 to 3 cups of powdered sugar and use your mixer on low speed until the ingredients come together. Don't increase the speed of your mixer until the powder sugar is mixed in well. If not you will have powdered sugar all over the place.
Taste test the icing to determine if you need to add more powdered sugar. Once the ingredients have come together, slowly add in remaining powder sugar and beat using medium-high with your mixer.
If your icing is still too thin, add a small amount of powdered sugar and continue mixing. Is your icing too thick? Slowly add in a tsp of milk until you get the desired consistency.
Divide buttercream icing into three equal amounts.
Put a small amount of Wilton Christmas Red Gel Food Coloring into the first bowl using a toothpick. You don't need a bunch as you want the icing to look pink. Add a small amounts of gel food coloring until you get the desired results.
Put a small amount Wilton Teal Gel Food Coloring into the second bowl using a toothpick. Again, you don't need very much food coloring. Add a small amount of gel food coloring until you get the desired results.
Put a small amount of Wilton Grass Green Gel Food Coloring into the third bowl using a toothpick. Add a small amount of gel food coloring until you get the desired results.
Add each color of icing inside a piping bag and pipe the icing on the cupcakes. I used one piping bag and washed it between colors.
Top with Easter Themed Sprinkles and a Bunny Peep
Serve and Enjoy!