Preheat oven to 375°F and prepare a muffin pan by spraying each tin with nonstick spray.
Combine dry ingredients (oats, baking powder, and cinnamon - if using) in a large bowl. Add wet ingredients (milk, honey, eggs, applesauce, vanilla) and stir until combined. Add fruit (or any other mix-ins) and stir to combine.
Pour batter into muffin tins and bake for 25-30 minutes.
Let cool and enjoy!
Notes
(Nutrition information will vary based on exact ingredients used - I calculated here with unsweetened almond milk and frozen blueberries.)Note that these are a lower sugar baked oatmeal cup, so adjust sweetener accordingly!