• Preheat oven to 350 degrees and prepare a baking sheet by lining it with a silicone baking mat. Set aside.
• In a mixing bowl, beat together 1 cup of the butter and 1 cup of the sugar until well combined - about 2 minutes.
• Add in 1 egg and 1 teaspoon of vanilla extract. Beat into the butter and sugar mixture until completely incorporated.
• Add the red food colouring and beat into the egg and butter mixture.
• Sift together 2 1/4 cups of flour, and 1 teaspoon of the baking powder. Add to the butter mixture and beat until just combined.
• Load the cookie dough into a cookie press which has been fitted with the disc of your choosing.
• Press the dough onto the prepared baking sheet, leaving 1 inch of space between each cookie.
• Bake for 8 minutes. Remove from oven and allow the cookies to cool slightly on the baking sheet for 2 minutes. Transfer the cookies to a wire cooling rack to finish cooling.
• Repeat ALL of the steps above, but this time, use blue food colouring.

For the Frosting:

• Beat the vegetable shortening in a large mixing bowl.
• Add the confectioner’s sugar one cup at a time, beating well after each addition.
• Next, beat in the vanilla extract and milk until fully incorporated.
• Once the cookies are fully cooled, spread one cookie with a teaspoon of frosting and top it with a second cookie. Be sure to use one red and one blue cookie!
• For best results, keep cookies refrigerated.