Preheat oven to 150 degrees (fan forced)
Arrange racks in oven so that one is towards the base and the other is at least two levels up allowing plenty of room in-between
Line two large baking trays with baking paper (dab a little oil on baking sheet to hold paper in place)
Ensure bowl and butterfly are clean (see note above)
Insert butterfly, put lid on TM bowl and place a container for your sugar on top
Weigh your sugar into the container, then remove 3 tablespoons of it to a smaller container and mix it well with the Matcha powder … ensure there are no lumps in the sugar or the Matcha/sugar mix before starting (I use the back of a spoon to press into the sugar to do this)
Place eggs whites and cream of tartar into bowl and whip 2 minutes / 50 / speed 4 (no MC)
Set blades to 10 minutes / speed 2 (no heat) and with blades rotating slowly add the caster sugar one teaspoon at a time through the hole in the lid … this should take you about 7 minutes
Once you have done that, again slowly add the Matcha/sugar mix one teaspoon at a time through the hole in the lid … this will take you about 2 minutes leaving about a minute before the 10 minutes is up (if this isn't the case, continue for 1 more minute to ensure that all the sugar is incorporated)
Lift the lid and create a little space around butterfly, then add cornflour, vinegar and vanilla and mix 10 seconds / speed 2
Using two long handled teaspoons (or whatever else you like), place two spoonfulls one on top of the other, onto the baking tray for each meringue (do not flatten as they will flatten in the oven … you want them sitting nice and high), placing them well part to allow for expansion in the oven
Sprinkle meringues with chopped pepitas
Place the trays into oven, close the door and reduce temperature to 120 degrees
Bake for 50 minutes
Switch off oven and leave to cool for at least 3 hours until completely cool (I usually leave it overnight)
When ready to remove from the baking tray, sprinkle well with icing sugar and place into a sealed container