Cinnamon Roll Baked Oatmeal is an easy breakfast bake with all the cinnamon-sugar flavor you want from a cinnamon roll, but in a simple oatmeal version.
Use old fashioned oats: Old fashioned oats give baked oatmeal the best soft, chewy texture. Quick oats can make it softer, and steel cut oats will not work the same way.
Use certified gluten-free oats if needed: Oats are naturally gluten-free, but they can be cross-contaminated during processing.
Swirl the brown sugar mixture gently: Pour the melted butter and brown sugar mixture over the oats, then lightly swirl it into the top so you get pockets of cinnamon roll flavor.
Bake until the center is set: The oatmeal should look firm in the middle and lightly golden around the edges.
Let it cool before drizzling: Let the baked oatmeal cool for a few minutes before adding the icing so it does not melt completely into the oats.