Healthy Blueberry Baked Oatmeal

Published by:
Liz Marino
| 05/09/2024 | Last Updated: 12/05/2025

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Blueberry Baked Oatmeal is a simple make-ahead breakfast recipe that is healthy and delicious! Gluten free and packed with flavor!

A white baking dish of Healthy Blueberry Baked Oatmeal with blueberries on the side.


 

When you need something quick and easy for breakfast – this Healthy Blueberry Baked Oatmeal is our go to!

This baked oatmeal is made with only 9 ingredients (many of which you probably have in your pantry/ refrigerator) and it’s packed with healthy whole grains, bursting with sweet blueberries, making it feel like a treat, but it’s a nutritious way to start your day.

There are few things better on a chilly morning than a big bowl of warm, cozy oatmeal, right? (Maybe a Healthy Blueberry Muffin..)

If you love oatmeal, but hate the mess of the sticky oatmeal covered pan, baked oatmeal is a must try. It’s way less work and just as delicious!

liz’s meal prep tips for blueberry baked oatmeal

  • This recipe makes 4 servings, so you cook once, clean once, and have breakfast ready for days. It’s also portable and easy to meal prep—I love baking a batch on Sunday to make the week ahead a little easier.
  • Enjoy it cold or warm! I prefer it warmed a little, but it’s great straight from the fridge too.
  • Bake it ahead of time and then reheat it when you’re ready to serve. If you mix together all ingredients and store them in the refrigerator for up to 24 hours before you’re ready to bake, the oats will absorb the liquid, and it will not cook correctly. For an overnight oats recipe, try this Blueberry Overnight Oats Recipe.

Ingredients

Ingredients for Blueberry Baked Oatmeal in small white bowls on a grey background: milk, cinnamon, ground ginger, nutmeg, old fashioned oats, blueberries, coconut oil, honey, egg

Baked Oatmeal Substitutions

Fruit substitutions: Baked oatmeal is pretty flexible and you can make a lot of substitutions to it. You can sub any type of fruit or berry in this recipe (apple, mango, strawberries, raspberries, blackberries, etc). I’d check out this Chocolate Peanut Butter Baked Oatmeal if you’re looking for something a little more decadent!

Frozen blueberries: I haven’t tried this with frozen berries – but I think it would work. I would thaw the berries completely and allow excess liquid to drain off before adding them to the batter. If you don’t thaw the berries, it might just make the texture a little soggy!

Coconut Oil: You can use olive oil or melted butter.

Honey: You can sub honey for maple syrup or agave. Use the same amount. I have not tried this with stevia so I’m not sure how that would work.

Vegan Baked Oatmeal: Sub egg for one flax egg, sub honey for maple syrup.

Gluten Free: Oats are gluten free, but if you have an allergy make sure you’re using gluten free certified rolled oats.

Milk: You can use any type of milk in this recipe. Regular dairy/non dairy will work!

Optional add ins: chopped walnuts, more chocolate, shredded coconut, fresh fruit or vanilla extract go great in this recipe.

Steel Cut Oats: You can use steel cut oatmeal in this recipe. Use 1 cup of steel cut oats and 2 cups of liquid/milk. We have a Baked Steel Cut Oatmeal recipe that you can also follow!

Quick Cook Oats: I have not tried this with quick cook oats and wouldn’t recommend it. I don’t think that it will hold up/cook correctly with the smaller oats.

Baked Oatmeal Cups: I haven’t tried baking these in muffin cups but I think it would work! The only thing I would say is it will be harder to clean up and it might stick to a muffin tin. I would grease the muffin tins or use silicone baking liners. You can bake for a little less time. 

Blended Oats: We love this Blended Baked Oats Recipe!

How to make blueberry baked oatmeal:

Wet ingredients for blueberry baked oatmeal in a clear bowl with a whisk.
  1. In a bowl, whisk together coconut oil, egg, honey + milk.
Wet and dry ingredients for blueberry baked oatmeal mixed in a clear bowl with blueberries on the side.
  1. Combine wet + dry ingredients.
Blueberries being folded into other ingredients for blueberry baked oatmeal in a clear bowl.
  1. Fold in blueberries with a spatula to prevent them from bursting
Uncooked blueberry baked oatmeal in a white square baking dish.
  1. Pour batter in a greased 8×8 pan – it will look like there is too much liquid, but it will absorb.
A white baking dish of Healthy Blueberry Baked Oatmeal with blueberries on the side.
  1. Bake for 35-40 minutes, until top is golden brown and milk is completely absorbed. Enjoy warm or cold!

You can even double this recipe – just put it in a 9×13 baking dish. You can use a ceramic, glass or metal baking dish. We also like this nonstick bakeware!

A white plate of blueberry baked oatmeal topped with whipped cream and blueberries with another plate in the background.

Storing:

Storing: This baked oatmeal will last in the refrigerator for up to 4 days. You can’t store this baked oatmeal at room temperature; it needs to be refrigerated!

Freezing: Baked oatmeal freezes really well! For best results, bake, slice, and freeze your oatmeal.

We recommend wrapping your individual portions in plastic wrap, or you can slice and freeze in a big freezer safe ziploc bag (but if they’re not individually wrapped, they might stick together)

Baked oatmeal will last about 3 months in the freezer.

How to Reheat Baked Oatmeal:

You can eat baked oatmeal cold, but if you want you can also reheat it!

Microwave: This oatmeal is great when microwaved for a minute.

Oven/Toaster Oven: You can also reheat baked oatmeal in a toaster oven or place the baking dish back in the oven if you’d like! I prefer this over the microwave because the edges get crispy

An overhead shot of blueberry baked oatmeal on a white plate with another plate and blueberries on the side.

Serving ideas

This baked oatmeal is great to eat on its own, but you could also serve it with:

An overhead shot of blueberry baked oatmeal on a white plate with another plate, glass of milk, and berries off to the side.

Other healthy baked oatmeal recipes:

We love cooking with oats! If you love oatmeal check out these other Healthy Oatmeal Recipes.

A white baking dish of Healthy Blueberry Baked Oatmeal with blueberries on the side.

Blueberry Oatmeal Bake

Recipe by: Liz Marino
4.82 from 50 votes
Healthy Blueberry Baked Oatmeal is a simple make-ahead breakfast recipe that is perfect for meal prep! Gluten free, easy to make, and packed with flavor!
Prep Time : 5 minutes
Cook Time : 35 minutes
Total Time : 40 minutes
Serves : 4 people
(hover over # to adjust)

Ingredients

Instructions

  1. Preheat oven to 350
  2. In a mixing bowl, stir all dry ingredients until combined. 
  3. In a separate bowl, whisk together coconut oil, egg, honey + milk.
  4. Combine wet + dry ingredients. Fold in blueberries with a spatula to prevent them from bursting
  5. Pour batter in a greased 8×8 pan – it will look like there is too much liquid, but it will absorb.
  6. Bake for 35-40 minutes, until top is golden brown and milk is completely absorbed. Enjoy warm or cold!
  7. Store in an airtight container in refrigerator

Notes

Baked Oatmeal Substitutions:
  • Fruit substitutions: Baked oatmeal is pretty flexible and you can make a lot of substitutions to it. You can sub in any type of fruit or berry in this recipe. I’d check out this Chocolate Peanut Butter Baked Oatmeal if you’re looking for something a little more decadent!
  • Make it vegan: sub egg for one flax egg, sub honey for maple syrup, make sure to use a dairy free chocolate chip
  • Make it gluten free: make sure you’re using gluten free certified rolled oats.
  • Optional add ins: chopped nuts, more chocolate, shredded coconut, fresh fruit

Nutrition Facts

Serving: 1square (based on 4 squares) | Calories: 267kcal | Carbohydrates: 46g | Protein: 7g | Fat: 7g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Trans Fat: 1g | Cholesterol: 41mg | Sodium: 19mg | Potassium: 198mg | Fiber: 5g | Sugar: 17g | Vitamin A: 79IU | Vitamin C: 4mg | Calcium: 30mg | Iron: 2mg
Course: Breakfast
Cuisine: American
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4.82 from 50 votes (8 ratings without comment)

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Recipe Rating




100 Comments

  1. 5 stars
    This is a staple breakfast. Easy & Delicious way to start the day.

    We switch up the fruit, week to week.

  2. Hello! How would you adjust the recipe to include protein powder? It looks delicious but I would like to up the protein. Thanks,

    1. I haven’t tried adding protein to this recipe, I’m sorry! You can check the comments here – I’m not sure if others have added to it! If you try it, let me know! Protein powder tends to make things drier, so you might need more liquid!

  3. 5 stars
    This is the recipe that got me hooked on following you!!
    It makes healthy breakfast easy! I use clean eating recipes in regular rotation several times/meals a week, but this one (or a variation of it) is
    must every week. Thank you!

  4. 5 stars
    Love this baked oatmeal . I’m going to try the other recipes