Level the top of the cupcakes (if domed) with a serrated knife
Apply a thin layer of green icing with a palette knife. Make sure the cupcakes are well covered with a smooth coat of green buttercream.
To pipe the flowers, hold the piping bag fitted with tip number 104 (with the wider end of the tip pointing up and the narrow end pointing down).
Place the tip with the wider end at the edge of the cupcake and gently squeeze your piping bag to let the icing out. Release the pressure on the piping bag and pull the piping tip towards the center of the cupcake to make the first petal.
For the second petal, turn the cupcake to 90 degrees, and pipe another petal in a similar manner to the first petal.
Repeat the process on the left and right of the first two petals. That should make 4 petals.
Repeat the process for the next 4 petals, by piping one petal in between each of the earlier piped petals.
Finally, finish off the petals piping by filling up one petal each in between all the petals that are already on the cupcake. That completes the daisy petals.
For the flower center, pipe some yellow icing in a circular motion with round tip number 5.
Lift the piping tip and encircle the yellow buttercream center with tiny dots of yellow icing to complete the decoration.
Repeat for all the cupcakes to complete the buttercream daisy cupcakes.