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