Blueberry Overnight Oats



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These blueberry overnight oats are loaded with blueberries and topped with a crunchy, gluten-free crumble. It’s like having a dessert for breakfast, but still healthy!

Remember that time I took leftover blueberry crumble and made overnight oats out of it? Gah, it was so delicious! I would have it for breakfast every morning if I could.

Blueberry overnight oats in a white and blue bowl with oatmeal crumble and blueberries on top.

Sadly it’s not too often that I have leftover crumble or cobbler sitting around. So I decided to remedy the situation by recreating a version of blueberry overnight oats with a crumble topping that can be made any day of the week. No leftover crumble necessary.

What Are Overnight Oats?

If you’ve never made overnight oats, you might be wondering what the heck these are! Essentially, it’s a no-cook way to enjoy oatmeal. Instead of cooking oatmeal on the stovetop or in the microwave, you soak the oats in milk. Overnight, the oats absorb whatever liquid you’re using and soften them up. The next morning you will wake up to a ready-to-eat, delicious breakfast!

Blueberry overnight oats in a large mason jar with lots of blueberries on top.

Ingredients in Blueberry Overnight Oats

Here’s what you’ll need to make these blueberry overnight oats:

  • old fashioned oats – rolled oats work best for overnight oats. They soak up the liquid overnight, which gives you a lovely creamy texture. Instant, quick-cooking and steel cut oats don’t work because they don’t absorb the liquid in the same way that rolled oats do.
  • milk – I like using unsweetened vanilla almond milk, but any type of milk will work.
  • vanilla protein powder – I use a plant-based vanilla protein powder that has a hint of sweetness from the vanilla flavor. If your protein powder isn’t sweet, you’ll likely want to add a little sweetener like maple syrup to your oats.
  • fresh blueberries – a must for blueberry overnight oats!
  • chia seeds – for extra fiber, protein and healthy fats. They also soak up some of the liquid.
  • vanilla extract – you can skip this, but I love the added flavor the vanilla adds to these oats.
  • crumble topping – everyone knows the best part of any sort of crumble, cobbler or crisp is the topping — same goes for these oats! To make this crumble you just need a few ingredients: rolled oats, oat flour, coconut sugar, coconut oil, sliced almonds and cinnamon.
Blueberry overnight oats in a white bowl with blue rim. Topped with blueberries, crumble and nut butter.

Can You Eat Overnight Oats Hot?

Short answer, yes! You can definitely warm up overnight oats, but the whole point of overnight oats is to eat them cold like bircher muesli. Even if you think cold oats sound strange, I recommend giving it shot before you write them off. Of course, if you simply can’t do the cold oats you can always heat them up. Just pop the overnights oats in your microwave, cooking in 30 second increments until the oats are warm throughout and enjoy.

How Long Do Overnight Oats Last?

When stored in an airtight container in the fridge overnight oats should last for up to 5 days. They will soften more the longer they sit so I find they’re best on days 1-3, but they’re still safe to eat on days 4 and 5. With this said, overnight oats are great for meal prep. Feel free to make a whole batch for the week on Sunday. I like prepping them in wide mouth 16 oz mason jars.

Blueberry overnight oats in a white bowl with blue rim. Topped with blueberries, crumble and nut butter.

More Blueberry Recipes to Try

More Overnight Oats Recipes

Check out all of the overnight oats recipes as well as the full collection of oatmeal recipes on EBF!

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4.45 from 20 votes

Blueberry Overnight Oats

These blueberry overnight oats are topped with a crunchy crumble. It’s like having a dessert for breakfast, but still healthy!
Prep Time: 10 minutes
Total Time: 10 minutes
Servings: 2


Crumble Topping

  • 1 1/2 Tablespoons old fashioned oats
  • 1 Tablespoon oat flour
  • 1 Tablespoon coconut sugar, cane sugar works too
  • ½ Tablespoon coconut oil, melted
  • 1 Tablespoon sliced almonds
  • ¼ teaspoon cinnamon


  • Combine: Place all ingredients (besides those for the topping) in a container and stir until well combined. Seal with a lid and place in the fridge overnight.
  • Prepare the crumble: Combine all ingredients for crumble in a small bowl. Set aside. (This can be done the night before as well.)
  • Serve: Bring out of the fridge in the morning and stir. You’ll notice that the protein powder, oats and chia seeds soak up a lot of the liquid so you may want to add a little more almond milk before serving. Portion overnight oats into two containers, top each with the crumble topping and a few extra blueberries. I also did a drizzle of almond butter! Enjoy.



  • Crumble topping substitute: No time to make the crumble topping? Simply top the oats with granola instead.


Serving: 1 | Calories: 336kcal | Carbohydrates: 49g | Protein: 28g | Fat: 12g | Saturated Fat: 4g | Polyunsaturated Fat: 3g | Cholesterol: 1mg | Sodium: 142mg | Fiber: 8g | Sugar: 13g

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Course: Breakfast
Cuisine: American
Keyword: blueberry overnight oats
Did you make this recipe?Mention @eatingbirdfood and tag #eatingbirdfood!

More Overnight Oats Recipes:

About Brittany

Hey there, I’m Brittany, the creator of Eating Bird Food, cookbook author, health coach and mama of two littles. Here you’ll find quick and easy recipes that make healthy fun and enjoyable for you and your family!

More about Brittany
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Recipe Rating


  1. 5 stars
    This was so delicious and more filling than my other overnight oats because of the Greek yogurt. I added fresh blueberries, raspberries and almonds on top for a bit of texture!

  2. 5 stars
    I came back to re make this recipe after eating it 4 days in a row. These are so delish! I made according to recipe but divided into 4 jars to have as a grab and go nursing snack. The vanilla protein in the oats gives it an awesome creamy flavor and the sweet crunchy crumble topping is the perfect add on. Can’t wait to have these again tomorrow!

    1. Ah yay! This makes me so happy to hear. I’m so glad you’ve been enjoying these overnight oats, Kaitlyn! Thanks for the review. I really appreciate it!

  3. 5 stars
    Love these Overnight Oats. Can’t wait to try them with fresh wild blueberries. Thanks. Like a lot of your recipes!

    1. Yay!! I’m so glad you’re enjoying these overnight oats, Chris! Thanks for the review 🙂

  4. 5 stars
    I didn’t think I’d like cold oatmeal, but I’m so glad I gave it a try. This was amazing and perfect for the super hot weather we had in the PNW. I tried it with sliced strawberries as well and that was just as yummy. This is a new favorite!

  5. 5 stars
    I had made your recipe it is so yummy that ,i ate it for breakfast regular. It gives me health and strength for a days work. thank you for your blueberry cobbler oats.

    1. I’m so happy you enjoyed these blueberry overnight oats! Thanks so much for the review. I so appreciate it!

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