Maple syrup is prepared from the sugary sap of the maple tree. The preparation involves tapping or piercing of tree to obtain this sap. These trees accumulate starch in their roots and trunks, especially in the period that precedes winter. The long accumulation of this starch makes it easy to convert it from the original state to sugar. During the spring season, the sugar rises and mixes with water to form a sap which is ready for collection or harvesting.
Since the sap contains a high water ratio, it has to undergo processing for the water to evaporate, leaving behind the concentrated, thick syrup. This final product is arrived at through a heating process. The entire process does not involve any use of chemical additives, preservatives, or agents. The Native Americans are said to have discovered that sap from maple trees could be processed to make maple syrup.