Preheat oven to 120c.
Cut a piece of baking paper to fit a baking sheet. Mark an 8inch circle in the middle of the baking paper. Flip over and place on the baking sheet. Lightly grease the baking paper and dust with cornflour.
In an electric mixer with a whisk attachment, place in your egg whites.
Whip until your egg whites are soft and foamy.
Slowly pour in your sugar as you continue to beat your egg whites.
Add all your sugar and mix until sugar has dissolved, the best way to tell is to rub a bit of the meringue between your fingers, if it's smooth you're ready for the next step, if not, keep on mixing.
Add in your cornflour, vinegar and vanilla and mix until combined.
Spoon out your meringue onto the middle of your marked baking paper.
Slowly spread your meringue, working it to the edges of the circle.
Smooth the top and sides as best you can
If you want to fancy up your pavlova, take your spatula or spoon and swipe up on the sides to create lines.
Place in the oven for 1 hour 15 minutes.
Once baked, leave the pavlova in the oven to cool completely.