1. In a large mixing bowl, combine the powdered sugar and sweetened condensed milk. Stir until a dough forms.
2. Add the peppermint extract and continue to mix until the flavor is evenly distributed.
3. If using, drop a few drops of red food coloring into the dough and gently knead it to create a marbled effect.
4. Dust your work surface with powdered sugar and roll the dough into small balls, each about the size of a marble.
5. Flatten each ball gently with a fork to create the classic peppermint shape.
6. Allow the candies to dry at room temperature for a few hours until they are firm to the touch.

A tip from Nonna Rosa: Let the kids help with the rolling and flattening. It’s a wonderful way to pass down family traditions and create lasting memories, just as she did with me in her bustling kitchen.