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unicorn cookies with buttercream frosting

Rainbow Unicorn Cookies with Buttercream Frosting

These unicorn cookies are buttery and soft as they are topped with a vanilla buttercream frosting. Show them off as a party decoration and enjoy them as a fancy treat for a unicorn birthday.
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Course: Dessert
Cuisine: American
Keyword: Buttercream Sugar Cookies, Unicorn Cookies
Prep Time: 30 minutes
Cook Time: 10 minutes
Decorating Time: 3 hours
Total Time: 3 hours 40 minutes
Servings: 18 cookies, depending on the size of the cookie cutter
Author: Leah Buehler

Equipment

  • Stand Mixer with Paddle Attachment
  • Rubber Spatula
  • Measuring cups and spoons
  • Medium Sized Mixing Bowl
  • Lined aluminum cookie sheet parchment paper or silicone lined baking sheet
  • Rolling Pin
  • Cookie cutters and tools see part 1 on this post for the specific tools needed

Ingredients

Buttercream Frosting

  • ½ cup room temperature unsalted butter 4 ounces
  • ½ cup room temperature salted butter 4 ounces
  • 4 cups powdered sugar
  • 1 tbsp. vanilla extract
  • 1-3 tbsp. whole milk

Sugar Cookies

  • 1 cup cold salted butter cubed
  • 1 cup granulated sugar
  • 3 cups all purpose flour measured with the scoop & level method
  • 2 tsp. baking powder
  • 1 egg
  • 1.5 tsp. vanilla extract

Instructions

  • Remove all of the butter from the refrigerator. You will make the sugar cookies first but the butter for the frosting needs to come to room temperature before mixing.

Sugar Cookies

  • Preheat the oven to 350℉ and prepare an aluminum cookie sheet by placing either parchment paper or a silicone baking mat on it.
  • In a medium sized mixing bowl, combine the flour and baking powder and mix together. Set this aside.
  • Cube a cup of salted butter and then, in a stand mixer with the paddle attachment, combine the cubed butter with the granulated sugar. Mix until creamed together well.
  • To the stand mixer, add in the egg and vanilla extract and mix until combined.
  • Slowly add in the dry ingredients in the mixing bowl to the stand mixer.
  • Roll the dough out to 3/8" thick and use the cookie cutters to cut out the cookies. Place the cookies onto the prepared baking sheet and bake for 9-11 minutes or until the tops of the cookies no longer look wet. When baking the cookies, only bake 6-8 cookies at a time to leave proper space between each cookie to cook without spreading. Overcrowding the cookie sheet will cause spread.

Buttercream Frosting

  • In a stand mixer with the paddle attachment, add the room temperature salted and unsalted butter and mix on high until light and fluffy.
  • Mix in the powdered sugar little by little. Add in the vanilla extract and milk about halfway through adding the sugar to help the frosting come together. Start with one tablespoon of milk and work up to three if needed, depending on the consistency you want. I like to aim for a peanut butter consistency or thinner.
  • Follow the directions in Part 2 for the specific way you will divide the buttercream and set up the icing bags.

How to Decorate the Unicorn Cookies

  • Please refer to Part 3 of this blog post for all of the cookie decorating tutorials.

Notes

These buttercream sugar cookies are room stable for a few days on the counter. Otherwise, store in the freezer in an airtight container until ready to use, or for up to three months. You can also freeze the undecorated cookies and buttercream frosting three months in advance to decorating.