Marshmallow Stuffed Chocolate Truffle Chunk Oatmeal Cookies

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

I have quite a long list of things I have baked and am yet to share with you (I’m sorry! The recipes are coming. Promise).

So I have been trying not to bake these last couple of months as I work my way slowly through the list.

But then occasions pop up. Dinners. Get togethers with friends. Birthdays, mostly.

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

Now as a dessert blogger, and as a pastry chef, there is definitely an expectation for me to bake things and bring them along (and of course, baking things for friends is always an absolute pleasure).

These cookies were for my manager’s birthday. They were a fantastic excuse for me to experiment and play and put all the things I absolutely love into a cookie.

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

And there was no way they were going onto the list. They simply couldn’t wait. I couldn’t wait. I had to share them with you. Immediately.

Because they were awesome.

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

They started with a trip to Spotswood, on a bit of a cafe roundup for a friend’s blog. There, we quite literally stumbled along the American-inspired Candied Bakery.

They had these huge cookies. With marshmallows inside. Um… Yum? I loved them.

So marshmallows were definitely going into my cookie.

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

I used my current favourite oatmeal cookie dough as the base, and threw a little coffee in because I love the depth of flavour it adds.

And you know how I said I was going to put homemade chocolate truffle chunks into everything? I am obsessed. So in they went.

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking

And so these ridiculously good, chewy, toasted marshmallow stuffed cookies were born.

Hope you love them as much as I did!

Marshmallow stuffed chocolate truffle chunk cookies | Butter Baking


For the homemade chocolate truffle chunks
180g milk chocolate, roughly chopped (6.5 oz)
60g unsalted butter, cubed (2 oz)
120g Nutella (4 oz)

Microwave the chocolate and butter in a small bowl in 30 second intervals, stirring between each burst.

Once the chocolate is melted, stir well to combine with the butter, and mix in the Nutella.

Line a tray with baking paper and spread the chocolate truffle mixture over it in a thin layer. Freeze for half an hour.

Remove the chocolate truffle from the freezer. Chop the truffle roughly into 1/2 inch chunks. Return to freezer until required.

For the oatmeal cookie dough
185g unsalted butter, softened (6.5 oz)
1 cup brown sugar
1/4 cup white sugar
2 tsp instant espresso powder
1 egg
1 egg yolk
1 tsp vanilla
1 1/4 cups plain flour
1 cup rolled oats, finely ground to a powder using a food processor
1 tsp cornstarch
1/2 tsp baking soda
1/2 tsp salt
1 quantity chocolate truffle chunks
20 marshmallows (approx.)

Preheat the oven to 180 C (350 F) and line a few trays with baking paper.

Using an electric mixer, beat the butter, both sugars and coffee until light and fluffy.

Add the eggs and vanilla, beating well between each addition.

Turn the mixer to low, add the flour, ground oats, cornstarch, baking soda and salt and mix until just combined.

Stir in the chocolate truffle chunks

Scoop tablespoons of mixture and flatten them in your hand. Place a marshmallow in the middle, and mould the cookie dough around the marshmallow, not sealing it entirely around the top.

Place on cookies on the lined trays, allowing room for spreading. Sprinkle lightly with extra sea salt, if desired

Bake for around 10 minutes, until the cookies are lightly golden around the edges and the marshmallow has begun to toast. Makes 20 large cookies.

Happy baking!

28 Thoughts on “Marshmallow Stuffed Chocolate Truffle Chunk Oatmeal Cookies

  1. Looks yummie, will definitely go onto my list LOL which is also pretty long 😉 (not the waiting-to-be-on-my-blog list, but the have-to-bake list :D)

  2. grandbabycakes on February 25, 2013 at 1:40 am said:

    These cookies look so awesome. I love that surprise of warm marshmallow in the center.

  3. Natasha, you are messing up my “to bake” list! Your recipes keep replacing the one at the top!! Having already fallen in love with your last truffle cookie, I have no choice but to bake this one today. (My son declared it in the top 3 cookies of all time :) ) I’ll let you know but these do look amazing. Thanks!

    • Ahahaha! Happy to be messing with your “to-bake” list! Those recipes that motivate you to get right in there and bake straight away are usually the best!
      Hope you love them as much as the others, and am SO happy to hear your son liked the others so much 😀 😀
      PS. The peanut butter and chocolate truffle thing worked amazingly well. Even made a version of them so sell at work today. Stay tuned for the recipe, it’s all thanks to you 😉
      PPS. Have you made the brownies yet?!

      • I can’t wait for the peanut butter truffle recipe, Natasha! I made another batch of the Chocolate Truffle Swirl cookies (using chocolate peanut butter) for this week’s care package (by request). I also made these marshmallow oatmeal cookies and though tasty, I think I prefer the texture of the Truffle Swirl cookies. If you would stop posting distracting delicious recipes, I might finally use the kitkat bars I especially bought for the brownies! :)

        • It will be up soon, I promise!
          Haha I am so happy to hear you liked those cookies so much :-)
          I love a super chewy oatmeal cookie, but if you love the truffle swirl texture better, you could always put marshmallows in them, too!
          And I’m sorry but I just posted some more brownies… Make the kit kat ones first. But if you’re ever watching your weight, make these new peanut butter swirled ones 😉

  4. These do look awesome Natasha :-) Cookie experiments are so much fun, that’s what I’ve been up to this weekend as well 😀

  5. Looks incredible. Keep up the good work!

  6. Love everything about these cookies!! More of the homemade chocolate truffles would be eaten than would make it into the cookies!

  7. Love your blog and these cookies look delish!

  8. Hands down one of the most creative cookie recipes I’ve seen! I have the same problem in that I have a huge list of recipes ready to be posted, but I keep on baking for multiple reasons. It makes me feel better knowing there’s someone else with the same “problem” – I seriously thought I was the only one!
    P.S. That must feel so exciting being able to call yourself a pastry chef now! I’m a little jealous. :)

    • Thanks Alex!
      Hahah well I’m definitely with you on that problem :-) happy to hear I’m not the only one too!!
      PS. It is super exciting/weird! Don’t be jealous! 😀

  9. Yummmm.. I love how u combine so many different favors together. I love your blog. Cant wait to try this!

  10. Marshmallows in cookies? Never tried it before, but it sounds delicious!

  11. These look amazing! I have some truffle chocolate waiting for me in the fridge! I made it for your chocolate truffle cookies…but now I am thinking I should add some marshmallows, too! Thanks for sharing. My husband will love these!

  12. Pingback: >Peanut Butter Swirled Healthy Fudge Brownie Bites | Butter Baking

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