Mix on slow speed for 1 minute until mix is combined.
Mix for a further 2 minutes on second speed.
Mould cookie dough pieces of 60g, 40g and 20g into balls.
Place the cookie dough pieces onto tray and flatten slightly.
Bake at 180°C for ± 15 minutes.
Place the Whip & Go and colour green in a cake mixer mix on second speed for about 5 minutes.
Place the green Whip & Go into a piping bag with a star and nozzle then pipe a flat layer on the 60g baked cookie, starting from the outside and finish in the middle. Place the 40g cookie on top and pipe whip & go again then place the 20g cookie on and pipe whip & go for the last time.
Sprinkle the Christmas tree with non-pareil sprinkles.