Mix the Base: In a stand mixer, combine 1 stick (½ cup) unsalted butter, 1 tbsp whipping cream, 1 cup powdered sugar, and ½ tsp pure peppermint extract. Beat until the mixture is smooth and creamy.
Incorporate More Sugar: Gradually add the remaining 3 cups powdered sugar, a little at a time, until the dough pulls away from the sides of the bowl and is not sticky.
Divide and Color: Divide the dough into sections based on how many colors you’d like. If using, add 1-4 drops of food coloring to each section and knead until the color is evenly distributed.
Chill the Dough: Wrap each colored portion in plastic wrap and place them in the refrigerator to chill for about 1 hour. This helps firm up the dough, making it easier to roll.
Shape the Mints: Remove the dough from the refrigerator and roll each portion into ropes approximately ½ inch in diameter. Cut the ropes into bite-sized pieces, about ½ inch long.
Dry and Store: Place the cut pieces on a parchment-lined baking sheet and let them dry for about 12 hours at room temperature. Once dried, store the mints in an airtight container at room temperature for up to 2 weeks.