Color your icing with a small amount of food color on a toothpick. Keep adding until you get the color you like.( I use a mixture of buttercup yellow and a little lemon yellow)
Cut off end of plastic pastry bag and insert 1M tip from top. Fill pastry bag half way with icing.
Then start piping in the centre of the cupcake with the tip upright, pipe in a clockwise direction, while applying even pressure and working your way outwards .