Enjoy this blueberry baked oatmeal as a warm, comforting breakfast on busy mornings; prepare in no time at all and shove in the oven to cook to perfection! Plus, this vegan baked oatmeal is refined sugar-free, gluten-free, and dairy-free!
Combine the oats and water (or milk) in a large bowl and set aside to soak for 1-2 minutes while you gather the remainder of the ingredients.
Add all the spices, baking powder, omega seeds (optional), and sugar, and mix well.
In a separate bowl, mash the banana with a fork. You can leave it slightly chunky, however, the smoother it is, the more evenly distributed it will be in the baked oatmeal.
Combine the banana and oat mixture and stir well. This will act as the only binding agent as this recipe is egg-free.
Fold in the blueberries. Do this carefully if you're using fresh blueberries, or they may burst.
Pour the mixture into an 8x8-inch (20x20 cm) parchment-lined baking tin and flatten gently.
Bake in the oven at 350ºF/180ºC for 15 minutes. Optionally, turn on the grill/broil for the last couple of minutes to obtain a nice golden crust.
How to Make Ahead & Store
Make ahead: If you want to save even more time in the morning, prepare the wet and dry ingredients for this baked blueberry oatmeal in covered bowls in the refrigerator the night before. You can also pre-prepare the baking dish. Continue the recipe in the morning and it'll mean just a couple of minutes of prep.Alternatively, prepare the batter entirely without the blueberries or baking powder. Add in the remaining ingredients right before baking and optionally an extra splash of milk/water, if needed.Store: The vegan baked oatmeal leftovers can be stored, covered in the refrigerator for up to 5 days.Freeze: I haven't personally tried to freeze this blueberry baked oatmeal. However, with similar items I've frozen, this should be freezer friendly for up to a month. Thaw in the fridge overnight before eating and optionally reheat in the microwave or oven.
Experiment with the spices depending on your mood and the season. Blueberry is quite versatile and pairs with nutmeg, vanilla, cardamom, even pumpkin spice, etc.
Can you use any milk in baked oatmeal? Yes, If you want to use milk, I’ve made baked oatmeal with almond milk, oat milk, coconut milk, and cashew milk before with no issues. I use water instead of milk to save on calories/fat. However, if you want creamier results, then definitely use milk.
If you decide to make the batter the night before, omit the blueberries and baking powder until right before baking. You will also need to add an extra splash of liquid to the batter. Otherwise, the baked blueberry oatmeal may come out dry.