Place apple cores in a pot. Cover with just enough water to cover the cores. Add 1 tsp of sugar, mix. Let come to a boil, turn down to medium low and let simmer for 30 minutes. Turn off heat & let cool.

Once mixture is cool place a strainer over a glass jar, and pour mixture into the jar. The cores will stay on top, squeeze them with a spatula to get remaining juice out. Try it, it should be sweet, but if you want a little extra sweetness, add a tsp of sugar & mix. Let sit in fridge until ready to drink.