• Preheat the oven to 350 degrees F. Line two cookie sheets with parchment paper and set aside.
• Mix cake mix, oil, and eggs in a large mixing bowl until well combined.
• Drop the cookie dough onto the prepared cookie sheets using a #40 medium cookie scoop (or use two tablespoons of dough), leaving about 2 inches between each cookie.
• Bake for 10-12 minutes or until the edges of the cookies are set. Allow the cookies to cool on the sheet for five minutes, then transfer to a wire rack to cool completely.

Buttercream Frosting

• Beat the butter in a large mixing bowl with an electric mixer until smooth. Add powdered sugar, 2 tablespoons of milk, peppermint extract, salt, and 4-5 drops of food coloring and beat until smooth.
• Add additional milk one teaspoon at a time, and a few drops of food coloring, until the desired consistency and color is reached.
• Spread a layer of green frosting over each cookie with an offset spatula or knife.
• Melt the chocolate in a small microwave-safe bowl in 15-second increments until smooth. Allow the chocolate to cool slightly, then transfer it to a piping bag or a resealable sandwich bag.
• Make a small cut in the tip or at one corner of the bag, then drizzle the melted chocolate over the frosted cookies. Allow the chocolate to set before serving.