2Place the bitter orange peels in a large pot and cover with 1000g of water. Bring to a boil, then reduce heat and simmer for 15 minutes. Drain the bitter orange peels and discard the water. Repeat this boiling and draining process two more times (for a total of three boils) to remove bitterness.
3In a clean large pot, combine the piloncillo, remaining 500g of water, Mexican cinnamon stick, and salt. Bring to a boil over medium heat, stirring until the piloncillo is completely dissolved, forming a syrup.