The use "Dried Hibiscus Flowers" (also known as "Hibiscus", "Sorrel", "Rosella", "Karkadé", "Rosemallow" or "Flor De Jamaica") in the kitchen is very interesting. Those lovely flowers grow on a plant which is a genus of flowering plants in the mallow family (Malvaceae). Hibiscus trees are native to warm, temperate, tropical and subtropical regions. Their flowers are very large and trumpet-like, and their colors range from white to pink, red, orange, purple or yellow.
Due to it's medicinal properties, some people call Hibiscus the "other cranberry". As a matter of fact, it's good to soothe colds, open blocked nose, clearing up mucous, as an astringent, promoting proper kidney function, helps digestion, a tonic, a diuretic and helps reduce fever. It is also very rich in vitamin C.
Nonetheless, I recommend you to be cautious when using those flowers as they have a hypotensor effect on us. It is for that reason that you'd better not consume this flower if you are suffering from hypotension (low arterial pressure).
With "Dried Hibiscus Flowers" one can make tea, syrup/cordial, all kinds of drinks and cocktails. They can also be crushed into flakes and used as condiment (to flavor rice, stews, sauces, ice creams, etc...) or added to cakes, scones or any pastry as well as dessert of your choice and even used as a food coloring agent.
Check my "Mouhalabieh or Lebanese Milk Flans" recipe that is served with a colorful "Hibiscus & Rosewater Syrup".