Preheat your oven to 275F and line a large baking sheet with parchment paper or a Silpat mat.
Add the egg whites to the bowl of a stand mixer fitted with the whisk attachment. Make sure the bowl is clean and has no traces of fat or water!
With the mixer on medium-low speed, slowly add the granulated sugar (about 1 tablespoon at a time). Make sure to give the sugar plenty of time to incorporate before you add the next spoonful– adding the sugar too quickly can result in cracked or dense meringues.
Once all of the sugar has been added, turn the speed to medium-high and beat until stiff peaks form– about 2 minutes.
Next, add the vanilla, cinnamon, and nutmeg and whisk to combine.
Transfer the mixture to a piping bag fitted with your choice of tip and pipe 1” meringues onto the baking sheet, making sure to pipe them at least 1” apart. If you don’t have a piping bag, you can use a plastic bag or two spoons!
Bake the meringues for 1 hour. Then, turn off the oven but leave the meringues inside to cool for another hour.
Transfer the cooled meringues to an airtight container and store them at room temperature for up to two days.