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Marbled Shamrock Sugar Cookie Sandwiches

Course Dessert
Prep Time 1 hour 15 minutes
Cook Time 9 minutes
Servings 10

Ingredients

*For the cookie dough:*

  • 1 cup of butter softened; use unsalted if you like
  • 1 ½ cups of powdered sugar
  • 1 tsp vanilla extract
  • 1 egg at room temperature
  • 2 ½ cups of all-purpose flour
  • ½ tsp baking soda
  • 1 tsp cream of tartar
  • ½ tsp salt
  • Green food coloring

*For the frosting:*

  • ½ cup of butter preferably salted
  • 3 cups of powdered sugar
  • 1 tsp vanilla extract
  • ½ tsp salt
  • 3-4 tbsp milk

*For garnish:*

  • ½ cup of sprinkles

Instructions

*For the cookie dough:*

  • In a stand mixer, beat softened butter and powdered sugar until it's light and fluffy, about 5 minutes.
  • Add vanilla and room temperature egg, mix for about 1 minute on medium speed.
  • Incorporate dry ingredients and mix until the dough comes together.
  • Take about ⅓ of the dough, mix in 1-2 drops of green food coloring, and cover both doughs. Refrigerate for 1 hour (or up to 24 hours).
  • When ready to bake, let the dough warm up on the counter for 30 minutes.
  • Preheat the oven to 350°F. Roll out the dough, alternating between normal and green dyed dough.
  • Use cookie cutters to cut out shapes and place on a parchment-lined sheet.
  • Bake for 8-10 minutes until edges turn golden brown. Refrigerate unbaked cookies before baking to maintain their shape.
  • Let them cool on a rack after baking.

*For the frosting:*

  • Beat butter and powdered sugar in a stand mixer until smooth (about 2 minutes).
  • Add vanilla, salt, and milk; mix until smooth and incorporated.
  • Transfer the frosting to a piping bag fitted with your preferred tip.
  • Place one cookie with the marbled side down, golden brown facing up.
  • Pipe frosting evenly onto the cookie and then place another cookie, marbled side facing up, on top.
  • Press the edges of the cookies into sprinkles for a delightful finish.