Chocolate Costco Muffins

The Story:
            Do you remember those big school or family functions when you would see that glorious selection of Costco Muffins?  Usually the parents would cut them in half or even in quarters, but that didn’t dare stop you from taking more than the equivalent of one huge muffin. 
            If I remember correctly, those muffins average over 500 calories a pop… and by pop I mean muffin.  This copycat recipe provides less calories and smaller portions that probably fit all of our lifestyles better. 
            Seriously, these are so good, and they look beautiful when they come out of the oven. 

3 eggs
½ cup milk
½ cup oil
¼ cup water
1 teaspoon vanilla
1 devil’s food cake mix
1 (3.9 oz) package instant chocolate pudding
1 teaspoon cinnamon
¾ cup sour cream
1 ½ cups semisweet chocolate chips

1.     Preheat oven to 375 degrees and line muffins tins with liners.
2.    In a large bowl, lightly beat eggs.
3.    Add oil, milk, water, vanilla, and beat again. 
4.    Stir in sour cream, and then add cake mix, pudding mix and cinnamon. Do not over mix.
5.    Stir in chocolate chips and fill muffin liners 3/4 full. 
6.   Bake for 15-20 minutes or until a toothpick comes out clean OR the tops spring back. 
7.    Remove immediately from muffins tins and let cool for 10 minutes, then store in n airtight container.  If the container steams because they are not fully cooled, don’t freak out, that just means they will not dry out.  

27 thoughts on “Chocolate Costco Muffins

  1. 1
    ~Judy~ says:

    WOW….what's not to like!

  2. 2
    Chef Dennis says:

    how could you not love chocolate muffins! Thanks for sharing your memories and creation with us!

  3. 3
    Lisa says:

    Oh wow, with muffins like yours I'd say goodbye Costco and hello yum! They look fantastic. I have a sweet treat linky party every weekend on my blog and I'd like to invite you to stop by then and link your muffins up.

  4. 4
    Jess says:

    Those muffins are my husbands favorite, I can't wait to try this recipe. Thanks!

  5. 5
    Evelyn Marie says:

    Love your Blog!! Any tips on how to get a perfectly rounded muffin top??? Mine always come out flat… 🙂 Thanks!

  6. 6

    These look fantastic. Do you make them in the jumbo muffin or regular? Thanks!

  7. 7
    Rebecca Smith says:

    Great blog! Just looked it up, the Costco chocolate muffins actually have 690 calories each. If you buy the Apple Crumb muffins, they are 920 calories each! I am definitely interested in your recipe, it looks great. And likely a better option for us chocolate lovers. Keep up the good work!

  8. 8
    Fatima says:

    I guess I have the same question: HOW CAN WE GET THE PERFECT ROUNDDED MUFFIN TOP?? I being making cupcakes for a while now but no matter what recipe I follow my cupcakes are always FLAT!!! Please HELP

  9. 9
    megan says:

    My roommates are going to love you! thanx so much for these fantastic recipes 🙂

  10. 10
    scianna says:

    hi lizzy do you think you would be able to make just a plain chocolate chip muffin?thank you in advance!

  11. 11

    When some one searches for his vital thing, therefore he/she wishes to be available
    that in detail, so that thing is maintained over here.

  12. 12
    kresta says:

    yum! I love chocolate muffins bless you.

  13. 13
    mel says:

    Hi! how many muffins does this recipe yield??

  14. 14
    Nancy says:

    Recipes that include eggs the amount you beat the eggs can affect the shape as well. Over beaten and you get a peak,under beaten and it’s flat.

  15. 15
    Missy says:

    Hi, answering the flat muffin thing….. if you’re using a mix, chances are it has been sitting in a store room and then on a shelf for a good amount of time, I have always found that mixing my box mixes for 2 or 3 minutes longer than called for helps my cakes and muffins to fluff up considerably more than when I follow the directions.

  16. 16
    Kendra says:

    Do you suppose I could make this into a loaf pan?? I would of course, adjust the baking time. Thank you!

  17. 17
    Dawn says:

    Hi, I made a variation of these muffins today and they are actually better than the Costco muffins. I thought I had all of the ingredients however I was mistaken. So to improvise, I used a box of german chocolate cake mix and added a HEAPING tablespoon of cocoa powder. I also used Hersey’s chocolate pudding mix and forgot to add the cinnamon. I can’t wait to try your actually version. Thank you for sharing.

  18. 18
    nicole says:

    I really want to try this with a gluten free cake mix! I think I know what my weekend plans are going to be.

  19. 19
    Allison says:

    Have you tried substituting the chocolate cake mix/pudding for white/vanilla and substituting the chocolate chips for blueberries? My two favorite Costco muffins are the chocolate and the blueberry!

  20. 20

    Hey great post. I hope it’s ok that I shared it
    on my Twitter, if not, no problem just let me know and I’ll remove it.
    Regardless keep up the great work.

  21. 21
    susan says:

    My 12 year old was asking to buy choc chip muffins at Costco recently and I didn’t want to buy 12. Looked on line and found this recipe!

    YUM! These are sooo good. I made some today and my kids (ages 10 and 12) were so excited!

    I had 12 without extra choc chips on top and 12 with extra on top. Guess which ones went first??

    I bought Betty Crocker Devil’s Food cake mix and Jello brand choc pudding mix 3.9 oz box. Will make again soon!

    • 21.1

      Oh good! This was one of my first recipes here on my blog, the photos make me cringe a little but I still remember how GREAT they were! And yes, I understand you not wanting to buy a pack of 12 muffins from Costco, I would accidentally eat them all!

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