Prepare your Basic Instant Pot Oatmeal. *Remember that additional time is needed for the Instant Pot to build pressure, about 8 minutes.
While cooking, stir together Milk and Powdered Sugar in a small bowl until combined. Set aside.
When oatmeal is cooked, divide into four equal servings. Stir 1/2 tsp. Cinnamon into each bowl.
Top with optional Raisins, remaining 1/2 tsp. Cinnamon, and drizzle with Icing. Serve warm, and ENJOY!