Preheat your oven to 200°F (93°C). This low temperature is perfect for drying out the meringues without browning them.
Line two baking sheets with parchment paper to prevent sticking and allow for easy cleanup.
In a clean mixing bowl, combine the room temperature egg whites, lemon juice, and a pinch of salt. Beat on medium speed until frothy using a hand or stand mixer.
Gradually add the granulated sugar about a tablespoon at a time, beating on high speed until stiff peaks form and the mixture is glossy.
Fold in the vanilla extract and peppermint extract gently with a rubber spatula to incorporate without deflating the mixture.
Dip a toothpick into the red gel food coloring and swirl it gently into the meringue for a marbled festive effect, being careful not to overmix.
Transfer the meringue mixture into a piping bag fitted with a star tip. Pipe small kisses onto the prepared baking sheets, leaving space between each.
Bake for about 1.5 to 2 hours until completely dry and easily lifted off parchment paper without sticking.
Turn off the oven and let the meringues cool inside with the door slightly ajar to prevent cracks. Once cooled, store in an airtight container.