Marbled Shortbread Cookies with Chocolate Marshmallow Ganache

I ‘invented’ these marbled cookies almost by accident. I originally planned to color my shortbread cookie dough with blue food coloring, intending to get a nice uniform color throughout. However, I added the dye too late in the process and what came out was an ‘interesting’ marbled effect. WHAT THA?

I should have added the food dye while first creaming the butter and sugar together- that way I could have blended the dye thoroughly in before adding the flour. But for some reason I decided to add the dye after the dough was completely formed and what came out was a marbled effect.

Should I throw out the dough and start again? No, I started to like these ‘new age’ cookies- maybe I could even call them ‘psychedelic cookies’ or even ‘tie-dyed cookies.’ No, I think I’ll call them ‘Marbled Shortbread Cookies’– sounds fancier.

In order to get the marbled dough effect, first completely make the shortbread dough: cream together the butter, sugar and vanilla, then add the flour to form the dough. Next add the food coloring and mix with the electric beaters. At this point, the food coloring won’t be able to blend thoroughly into the dough, so what you get is a crumbed, marbled effect.

IMG_6028Form the dough into small balls onto a baking sheet then press down to form the cookie shapes.


After they are baked and cooled, sandwich two cookies between a luscious chocolate/marshmallow ganache. You can eat them by themselves or serve them along side a chocolate sundae. Whatever we call these cookies (‘marbled’ or ‘psychedelic’) they sure do taste good!

Serve the cookies with a Chocolate Sundae

Sundae cropped

Tell me Dear Readers, have you ever made a recipe that turned out a lot different than you intended?

5.0 from 2 reviews
Marbled Shortbread Cookies with Chocolate Marshmallow Ganache
Recipe type: Dessert
Prep time: 
Cook time: 
Total time: 
Serves: 12
Marbled Shortbread Cookies filled with a delicious chocolate marshmallow ganache. Serve individually or with your favourite chocolate sundae!
  • For the Shortbread Cookies
  • 1½ cups (3 sticks) unsalted butter, slightly softened
  • 1 cup (125 g) powdered sugar
  • 2 tablespoons granulated sugar
  • ⅔ cup (85 g) cornstarch
  • 1 tsp teaspoon salt
  • 2 teaspoons vanilla extract
  • 2¾ cups(350 g) all purpose white flour
  • several drops of food coloring
  • For the Ganache
  • 250 g semi-sweet dark chocolate
  • ⅓ cup (80 g) heavy cream
  • 2 tbsp Marshmallow Crème (or Marshmallow Fluff)
  1. Using electric beaters, cream together the butter, powdered sugar, granulated sugar and vanilla extract until the mixture forms a smooth paste.
  2. Add the cornstarch, salt and flour and beat until a dough is formed.
  3. Now add several drops of food coloring and continue to beat with the electric beaters. The dough will now have a crumbed ‘marbled’ effect
  4. Using your hands, form the dough into small balls and place on a baking sheet lined with parchment paper. Flatten the balls into a cookie shape.
  5. Bake at 350 F (175 C) for 15 minutes and let cool.
  6. To prepare the Ganache, melt the chocolate and cream together in a double boiler over medium heat. Stir until the chocolate is melted and mixture is smooth. Stir in the Marshmallow Crème.
  7. Remove from heat and let cool in the fridge for 10 – 15 minutes until the mixture thickens. Spread about 1 tsp of the ganache over one cookie; add another cookie on top to form a ‘sandwich.’ Serve individually or with ice cream.

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  • Reply
    November 7, 2013 at 3:52 pm

    Oh my goodness these look gorgeous, I bet my friends little big would love these 🙂
    Renee recently posted…Drape Your Dashboard In Living ColorMy Profile

  • Reply
    Nami | Just One Cookbook
    November 7, 2013 at 5:28 pm

    Beautiful marbled cookies! I love shortbread texture more than typical American cookies. 🙂
    Nami | Just One Cookbook recently posted…Lost and FoundMy Profile

  • Reply
    Anneli Faiers
    November 7, 2013 at 9:39 pm

    Lol! What a happy mistake! I like the name Psychedelic Cookies – although you risk people thinking you added a little something extra!! I love the use of the marshmallow in the ganache…great idea that I will have to steal. x
    Anneli Faiers recently posted…Rustic French Style Beef Cheeks & LentilsMy Profile

  • Reply
    The Hungry Mum
    November 8, 2013 at 7:26 pm

    I love a happy baking accident! These look fab!
    The Hungry Mum recently posted…Pumpkin semifreddo and pumpkin snickerdoodles – two baking recipesMy Profile

  • Reply
    [email protected]
    November 10, 2013 at 1:40 pm

    Beautiful marbled cookies…and isn’t it awesome to discover something so delicious by accident? Hope you keep having more such delicious looking accidents.

  • Reply
    November 10, 2013 at 6:35 pm

    I already know I will be making this over Christmas with my daughter so I hope you don’ mind me borrowing your recipe! it will be using “Pillar Box Red” colouring and white ganache! YUM!
    GourmetGetaways recently posted…Getting About in ThailandMy Profile

  • Reply
    [email protected]
    November 11, 2013 at 12:01 pm

    The marbled effect is really cool! Isn’t it fun when accidents turn out to be better than what you originally intended? These look great, and sound delish. Good stuff – thanks.
    [email protected] recently posted…Quick Corn RelishMy Profile

  • Reply
    Simply Sweet Justice
    November 11, 2013 at 1:16 pm

    Yum, these would be perfect with hot chocolate!
    Simply Sweet Justice recently posted…“Cranpompear” Sauce (Cranberry Sauce)My Profile

  • Reply
    November 12, 2013 at 3:38 pm

    Oh Fran! These marble cookies are so cute, I love all the different colors…I love when mistake turns into such cuties.
    Have great week, and yes, I am back 😀
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  • Reply
    November 13, 2013 at 12:12 am

    These are so pretty!! The marbled effect is really so nice.
    Joanne recently posted…Penne with Butternut Squash, Kale, and Goat Cheese {12 Weeks of Winter Squash}My Profile

  • Reply
    Lizzy (Good Things)
    November 18, 2013 at 6:54 pm

    Hang on, how come I am not receiving your updates!? I can’t afford to miss your recipes xo
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