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You are here: Home / All Recipes / Mason Jar Egg Casseroles

July 28, 2017 By Nancylynn 47 Comments

Mason Jar Egg Casseroles

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These 21 Day Fix Mason Jar Egg Casseroles are a perfectly portioned and portable make ahead breakfast for the 21 Day Fix! This post contains affiliate links for products I’m obsessed with. 

Confession #119 – I was recently featured on a local news segment and was nervous as hell about doing live TV.

I didn’t even tell anyone it was happening until right before.

But it actually went really well.  I always say I’m most comfortable in the kitchen…and apparently a studio kitchen on TV is no different.

And if I can be totally honest, it fulfilled a crazy old dream of this girl’s…dating back to watching Julia Child with my grandmother in the 80s.

I always wanted to have my own cooking show.

My grandma used to give me a pot, some uncooked spaghetti and a wooden spoons and I used to not only pretend to cook, I would narrate what I was doing to an imaginary audience.

This was pre-food network, people.  

Anyway, I never actually thought this dream would happen or even tried to pursue it…so it was more of a daydream than anything. And while doing a quick cooking demo on the local news might be as close as I come to a real cooking show, I’m still counting it as dream fulfilled!  When it’s your dream, you can do that, right?

Anyway, if you didn’t see it live, I demonstrated two make ahead breakfast ideas – my 21 Day Fix Baked Oatmeal Jars and these adorable and delicious egg casseroles.

21 Day Fix Egg Casserole

I love a good breakfast casserole, but always have trouble sticking to just one piece.  I mean…bacon, egg and cheese anything is just so freaking good.

That’s why portioning these out into cute little mason jars BEFORE cooking helps you stay on track, plus they are perfectly portable without dirtying a single additional plate or container.

21 Day Fix Mason Jar Egg Casserole

I used cauliflower rice as the base of my casserole, and followed a similar layering technique as I did in my 21 Day Fix Crock Pot Breakfast Casserole, but I only did one layer of all the ingredients.  If you still aren’t sure about cauliflower rice, you could easily add roasted potatoes or sweet potatoes to the bottom of your jar. Still on plan!  But I’m always looking for ways to save yellows and add in more veggies.

21 Day Fix Egg Casserole

And I used turkey bacon, but these would be really yummy with breakfast sausage if that’s your thing!  One thing I will caution – the egg mixture tends to stick to the mason jars, so you really need to spray them well before filling.  Otherwise, this is such an easy breakfast to prep ahead and even have your kids help you make before a busy week!

You can use any size mason jar for this, but I love these 16 oz wide mouth jars the best!

21 Day Fix Mason Jar Egg Casseroles | Confessions of a Fit Foodie

I can’t wait to make more Mason Jar breakfasts and share them with you all!

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21 Day Fix Mason Jars Egg Casserole

★★★★★ 5 from 1 reviews
  • Author: Nancylynn Sicilia
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes
  • Total Time: 40 minutes
  • Yield: 4 servings 1x
  • Category: Breakfast
  • Method: Oven
  • Cuisine: American
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Description

These 21 Day Fix Mason Jar Egg Casseroles are a perfectly portioned and portable make ahead breakfast for the 21 Day Fix!


Scale

Ingredients

  • 6 extra large eggs
  • 1/3 cup of unsweetened original almond milk or milk of your choice
  • 2 cups of cauliflower rice
  • 1 cup of diced bell peppers or veggies of your choice
  • 6 slices of turkey bacon, crumbled, or 6 links of diced poultry breakfast sausage
  • 2/3 cups of shredded cheddar cheese or cheese of your choice (you can double this amount and just count it as a full blue)
  • salt

Instructions

  1. Preheat oven to 375 degrees and spray four, 12 oz or larger mason jars liberally with cooking oil spray.
  2. Add ½ cup of cauliflower rice to each jar and sprinkle with salt. Next, add in veggies and breakfast meat.
  3. Scramble eggs and whisk in milk. Divide egg mixture evenly among the 4 jars. Again, sprinkle with a little salt.
  4. Top evenly with shredded cheese and bake on a baking sheet uncovered for 25-30 minutes or until egg is set and the cheese begins to brown.
  5. Cool completely, then cover and store in the fridge for 3-4 days. To warm, remove cover and heat in the microwave for 1 minute.

Notes

21 Day Fix: 1 RED, 3/4 GREEN, 1/2 BLUE per jar

WW Freestyle: 2 points per jar (using low fat cheese and turkey bacon)


Nutrition

  • Serving Size: 1 jar

Keywords: breakfast, eggs, meal prep, mason jars, gluten-free, high protein, low-carb

Did you make this recipe?

Tag @confessionsofafitfoodie on Instagram and hashtag it #confessionsofafitfoodie

21 Day Fix Egg Casserole

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Filed Under: All Recipes, Breakfast, Cauliflower, Cooking Method, Courses, Diet, Gluten-Free, Hidden Veggies, Ingredient, Kid-Friendly, Stove + Oven

Reader Interactions

Comments

  1. Kori says

    September 16, 2017 at 3:24 pm

    Cauliflower rice?

    Reply
    • Nancylynn says

      September 16, 2017 at 3:58 pm

      Yup! It’s essentially just shredded cauliflower – you can buy it premade this way or just pulse your raw florets in a food processor!

      Reply
  2. Jocelyn says

    September 16, 2017 at 5:06 pm

    Sounds great! Do you think this would work with frozen cauliflower rice? If so, should I cook it first, or thaw it, or just keep it frozen? Thanks! Can’t wait to try this!

    Reply
    • Nancylynn says

      September 19, 2017 at 5:43 pm

      I would thaw it first, but you can keep it raw!

      Reply
  3. Erin says

    October 15, 2017 at 5:30 pm

    You Cook the turkey bacon first right?

    Reply
    • Nancylynn says

      October 15, 2017 at 6:36 pm

      yes!!

      Reply
  4. Erin says

    October 15, 2017 at 9:42 pm

    Great thanks Nancy!! Making it now ?

    Reply
    • Nancylynn says

      October 15, 2017 at 10:15 pm

      Let me know what you think!!

      Reply
  5. Karen says

    December 28, 2017 at 1:42 am

    Sounds yummy! Have you tried cooking these in an Instant Pot? If how long? Covered?

    Reply
  6. Julia says

    December 31, 2017 at 6:34 pm

    Have you ever made this in an instant pot? If so, what would you set it on and how long?

    Reply
    • Nancylynn says

      January 1, 2018 at 6:10 pm

      Yes! Five minutes on high pressure and a ten min natural release! I cook the bacon on saute first!

      Reply
      • Kelli says

        January 14, 2021 at 2:24 am

        All in jars still or in the liner? Or a Pyrex?

        Reply
        • Nancylynn says

          January 14, 2021 at 3:03 pm

          In the jars

          Reply
  7. Shawn says

    January 23, 2018 at 2:30 pm

    Wondering if these can be done in the microwave?

    Reply
    • Nancylynn says

      January 25, 2018 at 2:37 am

      Sure!

      Reply
  8. Amanda says

    January 31, 2018 at 5:49 pm

    I have 8 oz all jars. Will that be okay?

    Reply
    • Nancylynn says

      January 31, 2018 at 7:51 pm

      I think so!

      Reply
  9. Tina Pratti says

    February 11, 2018 at 1:54 pm

    You were on TV with my cousin Eve. Isn’t she the sweetest person ever.

    Reply
    • Nancylynn says

      February 11, 2018 at 6:02 pm

      Yes! I love that girl! <3

      Reply
  10. Holly White says

    May 27, 2018 at 3:39 pm

    What other containers could be used instead of mason jars?

    Reply
    • Nancylynn says

      May 29, 2018 at 3:09 pm

      I love the small pyrex ramekins!

      Reply
  11. Rebecca cochell says

    November 17, 2018 at 5:18 pm

    wish that you would put the net carbs fat and protein amounts

    ★★★★★

    Reply
    • Nancylynn says

      November 18, 2018 at 6:36 pm

      Hi Rebecca- I have been thinking of adding them, I just don’t always find the online calculators to be all that reliable. I will keep looking!

      Reply
  12. Kristen Scala says

    January 24, 2019 at 9:48 pm

    Do you think that if made on a Sunday that these will last until Friday? I like to meal prep for the week.

    Reply
    • Nancylynn says

      January 27, 2019 at 2:25 am

      I think they would! They also freeze well!

      Reply
  13. Liz says

    February 16, 2019 at 7:09 pm

    How long would you microwave these if you do not cook them ahead of time?

    Reply
    • Nancylynn says

      March 6, 2019 at 6:09 pm

      I’m sorry I didn’t see this- just a minute or two!

      Reply
  14. Titeta D Foote says

    April 3, 2019 at 1:38 pm

    Hi,I wanted to see if you could use another base

    Reply
    • Nancylynn says

      April 12, 2019 at 11:38 pm

      Sure! You can use potatoes or sweet potatoes…or whatever you want!

      Reply
  15. Siobhan says

    May 2, 2019 at 5:59 pm

    Hello, could you use 8 regular eggs (so 2 eggs per mason jar) if we weren’t adding bacon or turkey sausage? Or just add more red to our total if we do use bacon or sausage? I don’t ever have XL eggs on hand.

    Reply
    • Nancylynn says

      May 5, 2019 at 1:22 pm

      Sure! That works fine!

      Reply
  16. Kayla says

    May 15, 2019 at 2:27 am

    Should you freeze them before baking?

    Reply
    • Nancylynn says

      May 18, 2019 at 11:54 am

      Nope! You can bake and then freeze!

      Reply
  17. Jennifer says

    June 9, 2019 at 6:42 am

    How long would these stay for in the freezer?

    Reply
    • Nancylynn says

      June 9, 2019 at 8:22 pm

      three months

      Reply
  18. Jessica says

    November 17, 2019 at 4:22 am

    What size jar do you recommend for this?

    Reply
    • Nancylynn says

      November 18, 2019 at 5:11 pm

      These!!! (affiliate) https://amzn.to/37drAln

      Reply
  19. Mary says

    January 4, 2020 at 8:35 am

    Quick question, when it writes in the recipe – SCALE 1x, 2x, 3x,
    Does that mean that 1x is one portion?
    Because 6 eggs seem like 2 portions.

    Reply
    • Nancylynn says

      January 10, 2020 at 12:51 am

      No – that is to double or triple the recipe!

      Reply
  20. Ashleigh says

    May 31, 2020 at 11:46 pm

    If you use sweet potatoes as the base, do you cook them first before baking in the jars?

    Reply
    • Nancylynn says

      October 17, 2020 at 4:42 am

      If they were riced sweet potatoes, I think you could add them raw. Any larger and I would give them a little saute first!

      Reply
  21. Annie says

    July 21, 2020 at 1:33 am

    I really want to make this but I keep reading that mason jars are not oven-safe! Any suggestions for something else to cook it in?

    Reply
    • Nancylynn says

      October 17, 2020 at 5:05 am

      Try the original crock pot version-
      https://confessionsofafitfoodie.com/21-day-fix-crock-pot-breakfast-casserole-3/

      Reply
  22. Jeanette says

    January 7, 2021 at 8:19 pm

    I don’t own mason jars – I have young children and limit the amount of glassware in the refrigerator. Do you think This could be done using plastic Tupperware and a microwave?

    Reply
    • Nancylynn says

      January 11, 2021 at 5:21 am

      I think your best bet is to use a baking dish (8×8) to cook in the oven and then transfer to tupperware containers for storage in the fridge. I would avoid cooking the casseroles in plastic in the microwave, if you can!

      Reply
  23. Kelli Fitzgerald says

    January 11, 2021 at 2:16 pm

    So my first attempt didn’t cook the egg all the way through (found out while eating this morning.. ugh. Any advice on how to salvage the ones still in the fridge without burning them?

    Reply
    • Nancylynn says

      January 11, 2021 at 9:18 pm

      Bummer! You can cook them some more in the oven, or when you heat in the microwave put it in for a little extra time so that it can finish cooking. I would start with an extra 45 seconds at a time and keep checking them.

      Reply

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