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Rainbow Sugar Cookies

Easy to make Rainbow Sugar Cookies that would make any St. Patrick's Day celebration a little more colorful and delicious!  

Course Dessert
Keyword baking, cookies, dessert, rainbow
Servings 12 cookies
Author Censie


  • Your favorite recipe for sugar cookies (enough to make at least one dozen 3-inch circular cookies)
  • 1/2 stick butter softened
  • 1 cup icing sugar
  • 1-2 TBSP milk
  • 2 drops sky blue gel food coloring
  • 2-3 ounces red fondant
  • 2-3 ounces orange fondant
  • 2-3 ounces yellow fondant
  • 2-3 ounces green fondant
  • 2-3 ounces blue fondant
  • 2-3 ounces violet fondant
  • 40 mini marshmallows


  1. Preheat your oven according to your cookie’s recipe’s directions. Line a cookie sheet with parchment paper.

  2. Roll out your sugar cookie dough so that it’s about ¼ of an inch thick. Using your cookie cutter, cut out 12 circles.

  3. Place each cookie on lined cookie sheet and bake according to recipe’s directions.

  4. Allow the cookies to cool completely on a cooling rack.

  5. In a small bowl, beat together butter, icing sugar and milk using an electric mixer. These ingredients will make up your buttercream frosting.

  6. Once the ingredients are well-combined, smooth and form semi-stiff peaks, add blue gel food coloring.

  7. Mix until it’s completely tinted.

  8. Use an offset spatula to frost each cookie.

  9. Now, it’s time to create your fondant rainbow. Start with your red and work your way to the violet fondant, in the order listed above.

  10. Grab a small portion of your red fondant, and roll out a strip, about 3 inches long. Arch it on top of one of your cookies.

  11. Do the same with the rest of your colors, placing it just below its appropriate color. Trim on the sides where you see necessary. Repeat for every cookie.

  12. Place 2-3 mini marshmallows at either end of your fondant rainbow. Enjoy!