Christmas Tree Meringues

4 egg whites, medium
3.3 ounces confectioner's sugar
3.3 ounces Caster sugar
1/4 teaspoon cream of tartar
green food coloring
sprinkles, to decorate

1. Preheat the oven to 100 C.
2. Line two baking sheets with baking parchment.
3. Place the egg whites in a large bowl and using a hand whisk, whisk until the egg whites start to stiffen, about 3 minutes.
4. Alternatively, whisk the egg whites with a stand mixer, on medium, with a balloon whisk attachment, for about 3 minutes until the egg white starts to stiffen.
5. Add a tablespoon of icing sugar and whisk for 2-3 seconds.
6. Add a tablespoon caster sugar and whisk for 2-3 seconds.
7. Repeat adding the icing and caster sugar until all combined.
8. Add the cream of tartar and the green food coloring. Add more coloring until you get the color you would like.
9. Whisk until the egg whites are glossy and form stiff peaks, about 4-5 minutes.
10. Fill a piping bag fitted with 1 cm star nozzle with the meringue.
11. Pipe the meringue in a swirl shape onto the baking parchment.
12. Scatter any sprinkle decorations over the meringue swirls.
13. Bake at 100 C for 60-90 minutes.
14. Allow the meringues to cool on a wire rack.
15. Decorate with edible glitter, edible luster spray or icing sugar and stars.

Notes:
The meringues can be kept in an airtight container for up to 2 weeks, or can be frozen for up to one month.
Add 2 teaspoons peppermint extract, or 2 teaspoons ground ginger and 1/2 teaspoon mixed spice, for a festive flavor.

Submitted by Anne H.
Source: http://crumbsandcorkscrews.co.uk/christmas-tree-meringue/