Preheat oven to 350°F. Grease 8x8 baking pan or muffin pan if not using paper muffin cups.

In a large bowl, whisk together milk, eggs, maple syrup or brown sugar, melted butter, baking powder, vanilla, cinnamon, and salt.

Mix in the oats.

Pour batter into baking pan and level out. Use an ice cream scoop to portion muffin cups.

Bake at 350°F for 30-35 minutes until oatmeal is firm. Check with a toothpick.

Let the baked oatmeal cool then cut into squares or remove muffins from the pan.

Serve warm with maple syrup, honey, cream, or fruit.