Preheat your oven to 200°F (93°C) and line a baking sheet with parchment paper.
In a clean, dry mixing bowl, begin whipping the egg whites on medium speed until they become foamy.
Add the cream of tartar and continue whipping until soft peaks form.
Gradually add the granulated sugar, one tablespoon at a time, while continuing to whip on high speed until stiff peaks form.
Mix in the peppermint extract and desired amount of food coloring, if using.
Spoon or pipe the meringue mixture onto the prepared baking sheet, creating small mounds or swirls.
Bake the meringues in the preheated oven for 1.5 to 2 hours, until they feel dry and lift easily from the parchment.
Turn off the oven and leave the meringues inside as they cool, preferably overnight.