Preheat your oven to 225 degrees
Place 3 egg whites, 1/4 teaspoon of cream of tartar and a pinch of salt in a large bowl that is very clean and completely dry
Beat on medium speed (with an electric hand mixer or stand mixer) until the egg whites are foamy and full of bubbles
Increase the speed to medium high and begin adding 2/3 cup of granulated sugar a little at a time until it has all been added
Increase the speed to high and beat until stiff, glossy peaks have formed
Add 1 teaspoon of extract and food coloring and beat until evenly distributed, if desired
Transfer the meringue into a piping bag with tip
Pipe desired shapes onto parchment lined baking sheets
Add sprinkles or sanding sugar, if desired
Bake in a 225 degree oven for 45 minutes without opening the oven door and then turn the oven off and let the cookies cool in the oven for 90 minutes without opening the door until the entire 135 minutes has elapsed
Allow the cookies to cool fully at room temperature and then transfer them into an airtight container for storage at room temperature