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    Home > Recipes > Breakfast and Brunch

    Mason Jar Overnight Oats

    Published: Jul 29, 2022 · Modified: Nov 7, 2022 · by Jess Smith · Jump to Recipe · 21 Comments · This post may contain affiliate links.

    5.6K shares
    Mason Jar Overnight Oats {Meal Prep}
    Mason Jar Overnight Oats {Meal Prep}
    Mason Jar Overnight Oats {Meal Prep}
    Mason Jar Overnight Oats {Meal Prep}

    Simple and delicious with rolled oats, chia seeds, almond milk, and fruit, mason jar overnight oats are a healthy breakfast to make ahead and take on the go.

    Overnight Oats on a white table

    Meal prepping friends, I know you're out there, and I have a great no-cook, make-ahead breakfast recipe to put on your list. When things get busy (looking at you back-to-school season), or we're eating lots of meals out, I feel so much more balanced if I have a healthy breakfast prepped in the fridge. I make them parfait-style in mason jars with delicious layers, but there are so many ways to customize (see below).

    Here's how!

    mason jars of peanut butter on a white table

    Ingredients

    Before you get started, set out your ingredients.

    • Rolled or "Old-Fashioned" Oats - Be sure to get rolled or "old-fashioned" oats. Quick cook oats, instant oats, or steel cut oats will work but won't have the same texture.
    • Nut Butter - Use any type of nut butter. I love natural almond butter or peanut butter.
    • Chia Seeds - Chia seeds add texture and nutrition. You can skip these or stir flax seeds or hemp hearts or your other favorite healthy additions to the liquid and oat mixture.
    • Liquid - Milk gives these a creamy texture - any dairy milk, oat milk, almond milk, or coconut milk are all great options.
    • Honey - Optional, but adds a bit of sweetness on top.
    mason jars of overnight oats on a white table

    How to Make Them

    Step 1: Layer Ingredients

    Assemble the overnight oats in layers right in the mason jars. Almond butter on the bottom, then chia seeds, then oats.

    Step 2: Pour Liquid over Top

    Pour liquid over the ingredients. The liquid will soak through to the chia seed layer but shouldn't affect the nut butter on the bottom.

    adding milk to overnight oats in a mason jar

    Step 3: Top with Fruit

    Add fruit on top if you'd like. Fresh fruit is great, but frozen works really well (it will defrost by the time you eat them). For a little added sweetness, add a drizzle of honey on top.

    mason jars of overnight oats topped with berries

    Step 4: Refrigerate

    Refrigerate, covered, for at least 8 hours and up to 5 days.

    jars of oats and toppings on a white table

    Variations

    • Add yogurt - Adding yogurt to the oats gives them an extra creamy texture and adds protein. Plain or Greek yogurt, flavored yogurt, or non-dairy yogurt options all work well. For the best results, substitute yogurt for about ⅓ of the milk. Whisk them together before pouring over the oats.
    • Add nuts or granola - Adding nuts or granola gives the oats more texture and protein. For the best results, add them on top right before serving so they don't get soft.
    • Add chocolate - Chocolate is always welcome in overnight oats! Stir some unsweetened cocoa powder and your sweetener of choice into the milk before pouring it over top. (Taste it to make sure it has your preferred amount of sweetness.)

    Jars for Overnight Oats

    • 8 oz Mason Jars or 16 oz Mason Jars - Either size will work. I make these in 8 oz mason jars and they are filled all the way to the top (as shown in photos above). If you make them in the 16 oz jars, you'll have plenty of room to stir everything together before you eat it if you'd like. I also use these reusable lids (instead of the metal lids that come with the jars) because they are so easy to wash and store.

    Do you stir overnight oats before eating?

    You don't need to, but giving them a little stir will help the oats to distribute more evenly in the liquid. If you assemble the jars in layers, you might want to stir everything together to combine it before serving.

    Rolled (Old-Fashioned) Oats vs. Steel Cut

    Rolled (old-fashioned) oats are the most common in overnight oats and get an increasingly creamy texture the longer they soak. They will be soft and slightly chewy after 8 hours. Steel cut oats are small grains and need to soak longer in order to soften - about 24 hours.

    Can I make the oats sweeter?

    Yes! Use sweetened almond milk or drizzle some honey, maple syrup, agave, or brown sugar in when you add the milk.

    Hot or Cold?

    Your choice. Overnight oats can be eaten cold from the fridge, at room temperature, or warmed briefly in the microwave.

    More Healthy Breakfast Recipes

    • Homemade Instant Oatmeal
    • Spaghetti Squash Egg Nests (I make these ahead and reheat all week. They're low-carb and so delicious!)
    • Light and Fluffy Whole Wheat Pancakes (these are freezer-friendly)
    • Make-Ahead Breakfast Burritos (also freezer-friendly)

    Favorite Tools

    • Glass Mixing Bowls
    • Flat Whisk
    Mason Jar Overnight Oats {Meal Prep}
    Print Recipe
    4.63 from 29 votes

    Mason Jar Overnight Oats Recipe

    Make a week's worth of healthy breakfasts with mason jar overnight oats. They can be easily customized and use nut butter, rolled oats, milk, chia seeds, and fruit.
    Prep Time10 mins
    Total Time10 mins
    Course: Breakfast
    Keyword: meal prep, overnight breakfast
    Servings: 5 servings
    Calories: 420kcal
    Author: Jess Smith via Inquiring Chef
    Cost: $3.00

    Equipment

    • Mason Jars 8 oz or 16 oz

    Ingredients

    • 10 Tablespoons Almond Butter (sub any nut butter)
    • 5 teaspoons Chia Seeds (optional)
    • 2 ½ cups Rolled or Old-Fashioned Oats
    • 2 ½ cups Milk (use any type of milk you like - skim, 2%, almond, oat, coconut, etc.)
    • 10 ounces Fruit, fresh or frozen
    • Honey (optional)

    Instructions

    • Set out five mason jars (I use 8 ounce but they are packed all the way to the top as in the photos; 16 ounce will give you more room to stir and add toppings; or use any other similar-sized container). Fill each jar with almond butter (2 Tablespoons / jar), chia seeds (1 teaspoon / jar), and oats (½ cup / jar).
    • Slowly pour milk over top, giving it time to fill in the spaces between the oats. (Note: Be sure that the oats are just barely covered with milk. You may need a little more or less than the amount listed.)
    • Top oats with frozen berries and a drizzle of honey (if using).
    • Put lids on the jars and transfer to the fridge. Refrigerate overnight and up to five days.
    • When you're ready to eat the oats, just pull them out of the fridge and dive in. You can stir everything together or eat the layers one at a time.

    Notes

    Chia seeds are optional, but they soak up the liquid and add a great texture contrast / layer with a bit of seedy crunch.
    Be sure to get rolled or "old-fashioned" oats. Quick cook or instant oats will soften too much if left overnight to soak in liquid.
    If you need these to be gluten-free, be sure to choose rolled oats that are certified gluten-free (not all are).
    Nutrition information was calculated using skim milk.

    Nutrition

    Serving: 1jar | Calories: 420kcal | Carbohydrates: 41g | Protein: 17g | Fat: 23g | Saturated Fat: 3g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 12g | Trans Fat: 0.01g | Cholesterol: 6mg | Sodium: 51mg | Potassium: 590mg | Fiber: 9g | Sugar: 8g | Vitamin A: 234IU | Vitamin C: 0.1mg | Calcium: 306mg | Iron: 3mg

     

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    5.6K shares

    About Jess

    Hi! I'm Jess. I am the recipe creator and photographer behind the 900+ recipes you’ll find on Inquiring Chef. As a mom to three young kids and professional cook, my mission is to make every moment in the kitchen and around the table count. If you’re looking for easy, flavorful, family-approved recipes, you’ve come to the right place! Learn more about me here.

    Reader Interactions

    Comments

    1. Joy

      May 05, 2019 at 9:24 pm

      I just prepped these tonight! I’m excited to try one tomorrow. Thanks for sharing another wonderful recipe.

      Reply
      • Jess

        May 07, 2019 at 9:29 am

        Yay! Hope you guys like them!

        Reply
    2. Neeraj Soni

      May 18, 2019 at 5:27 am

      Hii,
      i have read many of your recepies , and they were amazing …. the best part of ur recepies are they are working for me ….
      thanks for sharing such a delicious list with us….
      keep posting
      cheers……

      Reply
    3. Kayla

      January 19, 2020 at 5:04 pm

      Have you ever made these with water instead of milk?

      Reply
      • Jess

        January 19, 2020 at 6:46 pm

        I haven’t but I’m sure it would work!

        Reply
    4. Leira

      April 06, 2020 at 3:16 am

      Many thanks for your recipes !
      I've tried this one, but didn't read it until the end (I'm incorrigible) so I didn't put the "right" oats and it was very fluid this morning… 🙁 But I warm it up in the microwave for 2 mn and it was perfect ! (>> you can mention it 😉
      Delicious !
      The only thing I do declare it that it was really less nice than your picture ! ;P
      Tell me the truth, on your picture there is no milk inside, right ? ;D
      Have a nice day in this hard period of confinement because of Covid-19.
      All the best

      Reply
      • Jess

        April 12, 2020 at 1:35 pm

        Hi Leira - this note made me smile! I just made a batch of these for us to use this week and they definitely don't always look quite as photo-worthy as when I make them to photograph them for the blog. I bet if you use the rolled oats, yours will look very similar though. GREAT idea to warm them in the microwave! Perfect for these sometimes chilly spring mornings. Hope you are taking care and making it through this strange lockdown time.

        Reply
    5. Tammy

      August 02, 2020 at 11:01 pm

      5 stars
      Hi! Where did you get those jars?

      Reply
      • Jess Smith

        August 03, 2020 at 7:49 am

        Hi Tammy - I buy them from Amazon or Target. A link to them on Amazon is in the bottom of the post under - "tools" and there's also a link to these plastic reusable lids I use to cover them. Hope that helps!

        Reply
    6. Wanda

      April 16, 2021 at 1:17 pm

      5 stars
      I make this with Mango Nectar, a little bit of milk and the frosen tropical fruit blend offered at my local grocer. They are awesome. I never get tired of them and if I do I just change up the nectar and fruit. Chia seeds are a must though. TY for getting ne started on overnight oats. Besides being good they are good for you. My gastroenterologist is thrilled.

      Reply
      • Jess Smith

        April 22, 2021 at 8:52 am

        Oh those flavors sound great! I'll have to try it!

        Reply
    7. Heather

      April 18, 2021 at 9:22 pm

      Hi there! I see the ingredients and calories are for 1 tablespoon of almond butter but the directions say to do 2 tbl almond butter per jar?
      Thanks!

      Reply
    8. Lori

      January 30, 2022 at 1:51 pm

      Hi what size mason jars do you use. Thank you

      Reply
      • Jess Smith

        January 30, 2022 at 1:56 pm

        If you use 8 oz mason jars they'll be filled all the way to the top as in the photos (and may even spill over into a 6th jar). 16 oz will give you much more room. But either will work.

        Reply
    9. Ina

      February 16, 2022 at 7:38 pm

      Hi I’m thinking about making this recipe, if i put bananas can i still prep for 5 days?

      Reply
      • Jess Smith

        February 19, 2022 at 10:20 am

        Yes! The bananas will be just fine though as you can imagine, they'll soften and turn slightly brown as they sit in the fridge. You'll have the best luck if you add them at the bottom of the containers and they are well covered by the other ingredients - being surrounded by liquids will help minimize browning.

        Reply
    10. Jessica

      March 18, 2022 at 11:42 am

      instead of the almond butter can we use yogurt?

      Reply
      • Jess Smith

        March 18, 2022 at 11:48 am

        Yes! that would be delicious

        Reply
    11. Kristen

      March 29, 2022 at 11:35 am

      5 stars
      I am usually the person who makes 19 changes to a recipe before I try it, but since I’ve never had overnight oats before I followed your recipe exactly. OH MY GOODNESS it is sooooo good. I just had my first jar and now I can’t wait for tomorrow!!!

      Reply
    12. Mpho

      June 28, 2022 at 11:55 am

      Can we also add flax seeds?

      Reply
      • Jess Smith

        June 28, 2022 at 1:22 pm

        Absolutely! It's great with added flax seeds. No need to adjust the recipe. Whole flax seeds won't throw off the liquid amounts.

        Reply

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