Ensure bowl and butterfly are clean (see note) and insert butterfly into your TM machine
Heat oven to 120 degrees fan forced, and arrange rack into the middle of the oven
Line a baking sheet with baking paper (use a dab of oil under paper to keep it in place) and sift over generously with the extra cornflour … this will help to create a crust on the base of your mini pavlovas, and also allow them to release easily from the tray
Mix the cornflour, vinegar and vanilla together in a small container until it is well combined into a liquid
Place a bowl onto the TM lid and weigh in the caster sugar, put aside
Place egg whites and cream of tartar into bowl and whip 5 minutes / 37 / speed 3.5 (no MC)
Set blades to 3 minutes / 37 / speed 3 (no MC) and with blades rotating slowly rain in the sugar one tablespoon at a time through the hole in lid … this should take you 3 minutes, leaving 3 minutes for the mix to continue beating in the next step
Open lid and lightly stir the mix around the sides to ensure you are catching all the egg white, then replace the lid and continue mixing 3 minutes / 37 / speed 3 (no MC)
Open lid, create a little space around the butterfly, add the cornflour mixture and mix 10 seconds / speed 3
Remove the meringue to a separate bowl to work from so that it is easier to portion the meringue properly
Using two teaspoons (one to pick up the mix, and the other to help remove the mix from the spoon onto the tray), place 18 spoonsful of the meringue onto the tray, then go over the top of those meringues with another spoonful until the mixture is evenly distributed (I find it easier doing it this way so that I get an even amount of mix on each mini pavlovas)
Place into oven, reduce oven temperature to 100 degrees fan forced, and bake for 1 hour and 30 minutes
Switch off oven and leave to cool completely (I usually leave it overnight)
Next morning remove mini pavlovas from the tray and place into a sealed container until ready to serve