First, remove the petal. Only boil the petals because the seed in the middle is not to be consumed. So ensure that you only peel out the petals.
While peeling the Rosella petals, be careful of the red dye. It can stain your blouse.
Once you get all the petals, rinse it and boil it in a big pot with black sugar or honey sugar. You can control how sweet you want it to be.
Enjoy your Rosella drink..