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Baked Blueberry Overnight Oats Easy Healthy Recipe! ✅

Overnight oats meets baked oats for the ultimate meal prep breakfast! This Blueberry Baked Oatmeal starts with the oats softening in liquid overnight and then cooking to fluffy perfection. They’re garnished with juicy blueberries and topped with golden streusel for a dish that gets rave reviews every time!

Oatmeal is one of my favorite breakfasts. I love eating a warm and cozy bowl of oatmeal with quinoa or crockpot steel cut oats, but I’ll gladly eat it any way, shape or form.

Years ago I created this Blueberry Overnight Oats recipe and it became the inspiration for this Blueberry Baked Oatmeal.

If you’ve eaten baked oatmeal before, you know it can be a bit dry and thick.

This recipe is nothing of the sort because the oats are softened overnight in liquid, then cooked the next day until fluffy.

If that’s not enough, they’re topped with an all-over gold streusel.

This is the best breakfast for oatmeal lovers like me. 🙂

Why you’ll love this recipe:

  • Blueberry Baked Oatmeal is super fluffy, sprinkled with juicy blueberries, and topped with a golden streusel.
  • It’s completely prepared ahead of time for a delicious meal prep breakfast or brunch.
  • It can be customized in a variety of ways and can be made vegan or gluten-free with a couple of simple changes.

recipe ingredients

The ingredients used in this blueberry oatmeal can be customized as shown in the ingredient notes below.

Notes on ingredients

  • Oatmeal. Use old fashioned oats in this recipe. If you love steel cut oats, be sure to try my Pumpkin Baked Steel Cut Oats!
  • Milk. Use your favorite cow’s milk or not.
  • Sweetener. The sweeteners I have used can be substituted with your favorite sweetener in oatmeal and streusel.
  • Egg. Make vegan baked oatmeal by replacing the egg with a flax egg or egg substitute.
  • blueberries. Fresh or frozen blueberries can be used. If using frozen, thaw slightly and pat dry with a paper towel.
  • Flour. Replace all-purpose flour with oatmeal, almond flour, or 1-to-1 gluten-free flour to make gluten-free streusel.
  • Coconut oil. Coconut oil in streusel can be replaced with melted butter.

How to make blueberry baked oatmeal

There are two components to this recipe: overnight oats and a streusel topping.

The oatmeal is made the night before, where it will soak up the liquid and soften. This results in the fluffiest baked oatmeal ever.

pro tip: The streusel stamp can be made a few days in advance and stored in the refrigerator in an airtight container until ready to use. It can also be skipped entirely if you prefer!

See the recipe card below for full instructions.

  • Combine oats, almond milk, maple syrup, and cinnamon in medium bowl until smooth. Cover with plastic wrap and let cool overnight.
  • In the morning, add the egg and baking powder to the oat mixture and mix until combined.
  • Gently add the blueberries, then pour them into the prepared pan.
  • Combine 1 cup of the oats, flour, brown sugar, and a pinch of salt in a small bowl, then add the coconut oil until well blended.
  • Sprinkle streusel evenly over oat mixture.
  • Bake for 30-40 minutes until golden brown and allow to harden.

Frequent questions

How do you know if your baked oatmeal is done?

Cooked oats will be light brown around the edges and top and will settle in the center.

Can I make vegan baked oatmeal?

Blueberry Baked Oats can easily be made vegan. Simply replace the egg with a flax egg or egg substitute.

Do baked oats need to be refrigerated?

Baked oatmeal needs to be refrigerated. Store covered with cling film or in an airtight container for up to 5 days. It can also be frozen for up to 3 months.

Can you reheat baked oatmeal?

Microwave Blueberry Baked Oatmeal on a microwave-safe plate for 60-90 seconds or until heated through.

recipe notes

  • pro tip: The streusel topping can be made a few days in advance and stored in the refrigerator in an airtight container until used. It can also be skipped entirely if you prefer!
  • Store leftovers in the refrigerator for up to 5 days. It can also be frozen for up to 3 months.
  • Make this vegan baked oatmeal by replacing the egg with a flax egg or egg substitute.
  • Customize this Blueberry Baked Oatmeal to your liking using your favorite milk, sweetener, fruit, and spices.

Other delicious oatmeal recipes:

Have you tried this recipe?

If so, be sure to leave a comment and star rating below, and don’t forget to tag @flavorthemoments on Facebook and Instagram!

Baked Blueberry Overnight Oats

Overnight Baked Blueberry Oatmeal is fluffy baked oatmeal sprinkled with blueberries and a seasoned streusel topping. Get together the night before for the best breakfast or brunch!

For the oatmeal:

  • 2 cups old-fashioned oatmeal
  • 2 cups unsweetened almond milk or milk of your choice
  • ⅓ cup plain maple syrup or sweetener of your choice
  • 2 teaspoons ground cinnamon
  • 1 large egg, beaten
  • 1 teaspoon baking powder
  • 1½ cup fresh blueberries thawed or frozen when frozen

For the streusel:

  • 1 cup of old fashioned oats
  • ½ cup all-purpose flour substitute with oatmeal or almond flour if gluten intolerant
  • ½ cup packed brown sugar (or sub with coconut sugar)
  • 1/4 teaspoon salt
  • 1/2 cup coconut oil, melted* (or substitute with melted butter)

Prepare the oatmeal:

  • Place the oats, milk, sweetener, and cinnamon in a medium to large bowl and mix together. Cover with cling film and refrigerate overnight.Do not add egg or yeast.

    2 cups plain oatmeal, 2 cups unsweetened almond milk, ⅓ cup pure maple syrup, 2 teaspoons ground cinnamon

  • The next morning, preheat oven to 375 degrees and grease an 8×8″ square pan. Set aside.

  • Mix the beaten egg and baking powder into the oatmeal mixture until well blended, then gently add the blueberries. Pour the mixture into the prepared pan and spread evenly.

    1 large egg, 1 teaspoon baking powder, 1 ½ cup fresh or frozen blueberries

Prepare the streusel:

  • Combine 1 cup of oatmeal, flour, sugar, and a pinch of salt in a medium bowl. Combine the melted coconut oil until you get a homogeneous mixture. Sprinkle the streusel evenly over the oatmeal.

    1 cup old-fashioned oatmeal, ½ cup all-purpose flour, ½ cup brown sugar, 1/4 teaspoon salt, ½ cup coconut oil

  • Bake for 30-40 minutes on the center rack of the oven until most of the liquid has been absorbed. If the streusel starts to brown too quickly during cooking, cover it with aluminum foil for the rest of the cooking time.

  • Remove from heat and cool on a rack for 10-15 minutes. To a good time!

  • pro tip: The streusel stamp can be made a few days in advance and stored in the refrigerator in an airtight container until ready to use. It can also be skipped entirely if you prefer!
  • Store leftovers in the refrigerator for up to 5 days. It can also be frozen for up to 3 months.
  • Make this vegan baked oatmeal by replacing the egg with a flax egg or egg substitute.
  • Customize this Blueberry Baked Oatmeal to your liking using your favorite milk, sweetener, fruit, and spices.

Calories: 384 kcal, Carbohydrates: 54 g, Protein: 6 g, Fat: 17 g, Saturated Fat: 12 g, Cholesterol: 23 mg, Sodium: 150 mg, Potassium: 197 mg, Fiber: 4 g, Sugar: 25 g , Vitamin A: 49 IU, Vitamin C: 3 mg, Calcium: 156 mg, Iron: 2 mg

Nutrition is estimated using a food database and should only be used as a guide for informational purposes.

All recipes and images © Flavor the Moments.

** This recipe was originally published in May 2015. Updated photos, included step-by-step photos, and edited text to include more information about the recipe.

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