First make lilac sugar. There are several ways to do this, for this recipe we ground lilacs into our sugar using a mortar and pestle. You could also do it a slow infusion or in a food processor.
In a medium mixing bowl, Slowly add in your water or extract and mix into your lilac sugar until sugar is damp and evenly incorporated. I just spray some organic rose water on ours and it works great.
Using a spoon, densely pack your sugar into your mold. Use the spoon or your hands to firmly pack them as tight as possible. It will not hold shape unless it's packed very well.
Use a clean brush to brush off the excess sugar from the top of the mold.
Let them sit for six hours - overnight to let the sugar harden.