Retrieve dry wood ashes from a source of combustion and pass them through a sieve leaving only the powder.
Part a: Mix 50ml of Water with 15g of sugar to dilute the sugar.
Part b: Mix 100ml of water with 7.5g of agar agar.
Part c: Mix 100ml of water with 60g of wood ashes and 3g of calcium propionate.
Once each mixture is hydrated mix parts a and b together in a pot on the stove. When it starts to boil, then incorporate part c (the ashes mixture) and wait until it boils again. Put in molds and wait to dry.