Pre heat oven to 250 degrees and line a sheet pan with a silpat.
Place the egg whites, vinegar and cream of tartar in a mixing bowl. Using the wire whisk attachment whisk until the egg whites are stiff.
Turn the mixer to low and add in the maple sugar slowly. Once incorporated turn the mixer back to high and beat until the sugar has dissolved into the egg whites. Turn off the mixer and take out from the machine and scrape down the sides and carefully fold in the vanilla.
To bake mound the pavlova in the middle of the pan. You can just scrape it out of the bowl into the pan and spread out into a mound. It doesn't have to be pretty as you will be breaking it out into individual servings later on.
Bake for 1 hour and 30 minutes. Then turn off the oven and leave in the oven until it's fully cooled down.