01 - Peel, core, and slice the apples into 1/2-inch wedges for even cooking.
02 - Place the apple slices into the Instant Pot insert. Sprinkle brown sugar, cinnamon, nutmeg (if using), and salt evenly over the apples. Drizzle with maple syrup or honey if desired, then add the water or apple juice.
03 - Distribute the butter pieces evenly over the top of the apples.
04 - Close the Instant Pot lid and ensure the valve is set to sealing. Cook on high pressure for 2 minutes.
05 - Allow the pressure to release naturally for 3 minutes, then carefully quick-release any remaining pressure before opening the lid.
06 - Open the lid and gently stir in the vanilla extract. For a thicker syrup consistency, turn on Sauté mode and simmer for a few minutes while stirring gently. Serve warm over oatmeal, pancakes, or ice cream.