In a medium size pot melt the butter, then add the water, sugar and chopped peeled apples.
Stir and cook for about 3 minutes over medium/high heat just until the sugar has melted, then lower the heat to medium/low and continue cooking and stirring often for about 8-10 minutes, add the cinnamon in the last couple of minutes. The apples should be tender and the sauce a golden brown colour.
Move to a clean glass jar, let cool or use warm. Once it is cool it should be refrigerated, the longer it sits the thicker the sauce will become. Enjoy!
Notes
What are the best apples to use
The best apples to use for this recipe are a firm apple such as Braeburn, Granny Smith, Fuji, Pink Lady, Gala or Honeycrisp. Most people prefer Granny Smith because they are tart, which pairs perfectly with the sweet buttery caramelized sauce. It's not a good idea to use a softer apple because they will fall apart while cooking.
How to store it
Once the mixture has cooled down a bit, place it in a jar with a tight fitting lid and refrigerate. It should keep for up to 1 week in the refrigerator. I don’t recommend freezing.