Preheat the oven to 350 °F and lightly grease a 10-12 oz oven-safe ramekin.
Blended: Add all of the ingredients to the base of a high powered blender. Blend on high for 30-60 seconds until smooth.Unblended: Add all of the ingredients to a bowl and mix until well combined.
Pour the batter into the prepared ramekin, stir in any mix-ins and bake for 22-28 minutes until set and the center bounces back lightly when pressed.
Rest for 5 minutes to allow it to set for best texture.
Enjoy!
Notes
Microwave: Place in a microwave safe ramekin or bowl and microwave on high for 1 and ½ to 2 minutes. Each microwave can vary so the first time that you make them, I recommend checking after 1 and ½ minutes. If the center is not yet set, put them back in for the remaining 30 seconds.Air Fryer: Pour mixture into an air fryer safe ramekin and place in the center of an air fryer basket. Air fry at 300 F for 11-16 minutes, checking after 11 minutes. See this air fryer baked oatmeal for more details.Bake Time: I give a large range for the baking time as it varies depending on how wide your ramekin is and thus how thick or thin the oat layer is. The oats should appear set and bounce back lightly when pressed (like if you were baking muffins).MakeAhead: Once mixed, the batter must be baked immediately. If you would like to prepare these ahead, bake them fully and then reheat when ready.Leftovers: Leftover baked oats can be made ahead and stored in the refrigerator for up to 3 days. When ready to enjoy, simply reheat in the microwave or in the air fryer for about 5 minutes at 300 F.Protein Powder: I have tested this recipe with pea protein isolate and brown rice protein. I suspect that it would work fine with any protein powder of choice, but these are the only ones I have used.Omit the Protein: If you would prefer to make these without protein powder, simply increase the rolled oats to ½ cup.*Nutrition estimate calculated without cacao nibs.