Bake, cool your sugar cookies completely and prepare your mise en place.
You will need an off-peak consistency royal icing and soft/medium consistency royal icing.
Filling the Paper Cornets/Piping Bag:
I find filling the piping bag with royal icing the size of my palm, meaning the portion of the bag of royal icing in no larger than the palm of my hand.
Fill your piping bag to the size of your palm, this will ensure you don not injure your hand with too much icing.
Fill your piping bag/cornet, fitted with the #3 writer nozzle/tip, with the off-peak consistency.
Fill your piping bag, fitted with # 1.5 writer nozzle/tip, with the soft-medium peak consistency.
Fill your piping bag, fitted with the small leaf tip, with the off-peak consistency.
For leaf colour piped calyx mix 1/2 toothpick of vine green and 1/2 toothpick of moss green food paste. Do not completely mix the colour to achieve a variation coloured calyx.