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These Chocolate Marshmallow Surprise Cookies have a fudgy, brownie-like cookie base topped with a gooey, baked marshmallow that’s covered with a rich chocolate icing. An irresistible cookie that’s sure to fix any chocolate craving.
The second recipe I’ve made from my Martha Stewart Cookies cookbook are the Surprise Cookies, chocolate cookies with a melted marshmallow under a fudgy frosting. These cookies were absolutely delicious and were a big hit at the party I took them too.

I reduced the cook time for the cookie base so that the cookie is super tender and fudgy. If you want a sturdier, crunchy cookie, increase the cook time.
If you’re a chocolate cookie lover, you’re going to love this cookie.
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Chocolate Marshmallow Surprise Cookies
Ingredients
- 1 ¾ cups all-purpose flour
- ¾ cup cocoa powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- ½ cup 1 stick unsalted butter, softened
- 1 cup sugar
- 1 large egg
- ½ cup milk
- 1 teaspoon pure vanilla extract
- 12 large marshmallows cut in half horizontally
Chocolate Frosting
- 3 cups confectioners' sugar
- 6 tablespoons unsalted butter melted and cooled
- ¼ cup plus 1 ½ t. cocoa powder
- ¼ cup plus 2 T. milk
- ¾ teaspoon pure vanilla extract
Instructions
- Preheat oven to 375 degrees. In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt; set aside.
- In the bowl of an electric mixer fitted with the paddle attachment, cream together butter and sugar until light and fluffy, about 2 minutes. Add egg, milk, and vanilla, and beat until well combined. Add reserved flour mixture; mix on low speed until combined.
- Using a tablespoon or #40 scoop, drop dough onto ungreased baking sheets, about 2 inches apart. Bake until cookies begin to spread and become firm, about 7 minutes.
- Remove baking sheets from oven, and place a marshmallow, cut-side down, in the center of each cookie, pressing down slightly. Return to oven, and continue baking until marshmallows begins to melt, 2 to 3 minutes. Transfer cookies to a wire rack to cool completely before frosting.
- Prepare Chocolate Frosting: In a large mixing bowl, combine powdered sugar, cocoa and melted butter. Add milk and vanilla, and beat until smooth.
- Spread about 1 tablespoon of frosting over each marshmallow, starting in the center and continuing outward until marshmallow is covered.
Nutrition
More chocolate cookies you might like:
Black Forest Crinkle Cookies, Barbara Bakes
Chocolate Caramel Rolo Cookies, Barbara Bakes
Chocolate Snickers Cookies, Barbara Bakes
Peanut Butter Chocolate Cake Mix Cookies, Crazy for Crust
DoubleTree Cookie Recipe, The Little Kitchen
Copycat Starbucks Flourless Chewy Chocolate Cookie, A Dash of Sanity
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Suzanne Arney
these are just like cookies I used to buy for my kids when they were little years ago. It brought back happy memories. They are sooo good
Denise Westmoreland
Hi Melissa. When you say large do you mean the large (vs. mini) marshmallows that have been around forever? Or do you mean those LARGE marshmallows they sell now. I’m sorry if a stupid question but my sister-in-law just offloaded bags of both and I’m trying to find recipes (not cereal bars) that will use them up! Thank you so much. Denise
Melissa Griffiths
Just the regular large opposed the the mini! Thanks for asking!
Carolyn
These bad boys are addicting 😋
Linda
Can these suprise cookies be frozen, just wondering because of the marshmallow
Rosa Canneto
I’m baking these cookies tomorrow!!!! I love all of your recipes that I’ve baked.
Sandra
I was wondering if instead of an icing that you have to spread on, if I could use a ganache where I could pour it on and if the ganache would firm up for better stackability to put in a cookie give away box. Kind of like the pinwheels you buy in the store?? Pls reply
And if possible include a recipe for a pourable frosting that would set up. Thank you.
Barbara Schieving
Hi Sandra – I haven’t tried it, but it should work well. Here’s a recipe that you can use as a guide https://www.barbarabakes.com/daring-baker-mallows-and-milan-cookies/ Let me know how it goes.