• preheat the oven to 350 degrees
• in a medium bowl or mixer, combine the butter, sugars, egg yolk, and food coloring
• in a smaller bowl, mix the flour, baking powder, and salt
• add the dry ingredients into the wet ingredients, and mix well
• roll dough between 2 sheets of wax paper
• use a Shamrock shaped cookie cutter to make cookie shapes
• Preheat oven to 350 degrees
• Roll the dough out into an oblong shape that measures about 9"x12"
• Use a Shamrock cookie cutter to cut out shapes and place the shapes onto ungreased cookie sheets (or sheets lined with parchment paper)
• Bake for 8-10 minutes
• Let cool completely before transferring to a plate or small tray that will fit into the freezer
• pop the plate or plates into the freezer for at least 2 hours so cookies are cold

Filling

• Let the ice cream warm up a bit at room temp. for about 10 minutes
• take cookies out of the freezer
• Scoop out about 4 Tbsp. of ice cream per cookie and gently spread the top to even it out
• Gently press another cookie on top
• Place the cookie sandwiches on a wax paper-lined tray with wax paper and place them in the freezer for at least 2 hours or overnight

Serving

• When you take the cookies out, you can trim any stray ice cream
• You can also wrap each sandwich in wax paper for the kids to eat from