Preheat the oven: Set to 250°F and line two baking sheets with parchment paper.
Start the meringue: In the bowl of a stand mixer, combine egg whites and cream of tartar. Mix on medium speed for about a minute until frothy and bubbly.
Add sugar slowly: Add sugar one tablespoon at a time, letting the mixer run for 30–60 seconds between each addition. Don’t rush this step—it helps create a smooth, glossy texture.
Whip to stiff peaks: Continue mixing for about 10 minutes until the mixture forms stiff, shiny peaks that hold their shape.
Add color & flavor: Mix in vanilla or pumpkin flavoring and a few drops of orange gel food coloring. Scrape down the sides to fully incorporate.
Pipe the meringues: Transfer the mixture to a piping bag fitted with a large star tip. Pipe mound-shaped cookies onto the prepared baking sheets—about the size of a ping pong ball.
Bake & cool: Bake for 1 hour, then turn off the oven. Leave the meringues inside for another hour to cool slowly without opening the door. This helps them dry completely and stay crisp.