Try doing an oil infusion: dry the flowers face down low/warm overnight in the oven. Then put them in a glass jar (canning jars work well), 2/3 full. Cover with olive oil (or other liquid oil of preference) to at least an inch above, stir to remove bubbles. Lid it, set in sunny window 6 weeks (or so) stirring daily (pick up jar, turn over a few times and set back down). strain by removing lid and screwing ring back on over a coffee filter, invert jar (angled) over another jar, prop jar, puncture filter above oil line (in a dry patch) and let drain. Lid and label the oil, compost the dandelions or add 1/3 fresh and start another. Use the oil in salad dressing with dandelion greens or make soap or make an arthritis salve (dandelions supposedly have some minor pain relieving properties, particularly for arthritis). BONUS: early bee food for the flowers, chickens love the leaves, and the roots (dried and grated) make an ok coffee substitute.