Extra Dark Chocolate Cake with Cookie Butter Buttercream

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This light and moist dark chocolate cake is the perfect pairing for the creamy cookie butter frosting.  This is the perfect birthday cake or just because cake.

Extra Dark Chocolate Cake with Cookie Butter Buttercream

Confession time:  I have all sorts of stuff going on that I can’t talk about here and it is driving me insane.

Extra Dark Chocolate Cake with Cookie Butter Buttercream

I should just be super excited to tell you about this cake which Matt deemed one of his favorite combinations to date.  But I’m so distracted with everything else going in in my head that it’s hard to talk or write about other things.  Such is life, though, and hopefully soon that won’t be a problem anymore!  And no, I’m not holding out on a cookbook announcement or anything like that.  A Keep It Sweet Desserts cookbook would be fun, though, wouldn’t it?

Extra Dark Chocolate Cake with Cookie Butter Buttercream 11

Okay, I’ll talk about this cake for a second.  Like I said, Matt loved it.  He is pretty used to enjoying my desserts so when something gets an extra compliment it means I really did something right.  We had a few friends over who seemed to agree with the sentiment and considering I may or may not have had two big slices yesterday afternoon, I guess I liked it too (ahem).  The cake turned out perfect- it is the chocolate cake recipe my mom made for me growing up (my favorite used to always be chocolate on chocolate).  I added to the intensity by swapping water for coffee (she had just tried that too).  And the buttercream…. I almost forgot how much I loved egg white based buttercreams.  It is SO worth the effort.  I actually could have done with about 30% more buttercream for the cake.  Next time!

Extra Dark Chocolate Cake with Cookie Butter Buttercream
This light and moist dark chocolate cake is the perfect pairing for the creamy cookie butter frosting. This is the perfect birthday cake or just because cake.
Recipe type: Dessert
Makes: 12 servings
Chocolate Cake
  • 260g (~2 cups) all-purpose flour
  • 65g (~3/4 cup) good quality dark unsweetened cocoa powder
  • 10g (1¼ teaspoon) baking soda
  • 3g (1/2 teaspoon) salt
  • 170g (3/4 cup / 1½ sticks) unsalted butter, softened at room temperature
  • 375g (~1¾ cup) granulated sugar
  • 100g (2 large whole) eggs at room temperature
  • 5 milliliters (1 teaspoon) vanilla
  • 325 milliliters (1⅓ cups) brewed coffee
Cookie Butter Buttercream:
  • 75g (~1/4 cup + 1 tablespoon) egg whites
  • 32g (~3 tablespoons) granulated sugar
  • Additional 150g (~3/4 cup) granulated sugar
  • 50 milliliters (~3 tablespoons + 1 teaspoon) water
  • 227g (1 cup) unsalted butter, softened and cut into 1-inch cubes
  • 180g (~3/4 cup) Cookie Butter (or other speculoos of choice)
Make cake
  1. Pre-heat oven to 350 degrees
  2. Grease and flour two 8 or 9-inch round pans and line bottoms with parchment paper
  3. In a medium bowl, whisk together flour, cocoa, baking soda and salt; set aside
  4. In the large bowl of an electric mixer with paddle attachment, cream butter and sugar; add eggs and vanilla and beat one minute at medium speed
  5. Reduce speed of mixer to low and add ⅓ of the dry ingredients; add ½ of coffee and repeat
  6. Add remainder of dry ingredients and turn off mixer; make sure not to overbeat; if there are any lumps fold them in with a spatula
  7. Pour batter into prepared pans and bake for 30-35 minutes or until a toothpick comes out clean from center of cakes
  8. Set cake layers aside to cool for 10 minutes then carefully remove each layer from pans; run a knife around the edge of each layer for easier removal; set aside to finish cooling and make buttercream
  9. When buttercream is ready, put a spoonful on center of cake plate (this will help hold cake in place)
  10. Place one layer down and if rounded, use a serrated knife to cut off very top of cake; frost that layer and top with second cake layer; frost with remaining buttercream
To make buttercream
  1. Wipe the bowl of an electric mixer, whisk attachment, whisk, spatula and candy thermometer with a paper towel and vinegar to clean (if any grease is on these items your meringue will not work)
  2. Place egg whites in large bowl with whisk attachment and mix on medium speed; gradually add the 1⅛ ounces sugar; keep mixer on
  3. In a medium heavy duty saucepan, combine water and remaining 5¼ ounces of sugar over medium-high heat and whisk together; whisk occasionally until temperature of syrup reaches 248 degrees Fahrenheit
  4. Meanwhile, egg whites should begin to form loose peaks; if this happens before syrup is hot enough, reduce mixer speed to low
  5. Once syrup is hot enough, reduce mixer speed to medium-low and slowly and slowly add syrup to the mixer
  6. Increase speed to medium-high and keep mixer on for 10-15 minutes or until it holds stiff peaks AND bowl has cooled to room temperature
  7. Reduce the speed to medium and add softened butter, a couple of tablespoons at a time, until fully combined; mixture should be smooth and creamy
  8. If there are any lumps, increase speed to high until frosting becomes smooth
  9. Add cookie butter and combine on medium speed until well incorporated and buttercream is light and creamy
  10. Use immediately or store in an airtight container in refrigerator and beat with the paddle attachment of an electric mixer before using
Keep cake in a cool dry place (best kept refrigerated during summer)
Best served within 3 days of baking
Cake slightly adapted from Hershey
Buttercream slightly adapted from the Bouchon Bakery Cookbook

Extra Dark Chocolate Cake with Cookie Butter Buttercream


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20 Responses to “Extra Dark Chocolate Cake with Cookie Butter Buttercream”

  1. Joanne February 25, 2014 at 6:49 am #

    Now I’m wondering if I should take the day off and make this as a second birthday cake…hmmm. It looks seriously amazing!!

    Now I want to hear about all this exciting crazy stuff that’s going on!!

  2. DessertForTwo February 25, 2014 at 8:10 am #

    It looks absolutely perfect! The exact cake I want for my birthday!

  3. Liz @ Tip Top Shape February 25, 2014 at 8:23 am #

    Ooohh, this looks amazing!! Will you be sharing your exciting news on here at all??

  4. Kathryn February 25, 2014 at 8:56 am #

    This cake sounds totally epic! Love how rich and dark it is and the contrast with that super fluffy buttercream. Hope life calms down for you soon too xo

  5. Jessica @ A Kitchen Addiction February 25, 2014 at 3:57 pm #

    I’m all about extra-dark chocolate! I wish I had a big piece of this cake to get me through this long afternoon!

  6. sue/the view from great island February 25, 2014 at 4:12 pm #

    Dark chocolate is the holy grail for me when it comes to cakes, and this one looks incredibly moist!

  7. Erin @ The Spiffy Cookie February 25, 2014 at 6:56 pm #

    You know I don’t think I’ve ever made frosting from cookie butter. It’s a crying shame.

  8. Kayle (The Cooking Actress) February 25, 2014 at 8:58 pm #

    hmmmm…..are you pregnant??! (I’m sure everyone is guessing this, sorry to be annoying! lol)
    THIS CAKE LOOKS SO CRAZY AMAZING! I’m pinning it. Because it’s necessary!

  9. Bianca @ Confessions of a Chocoholic February 25, 2014 at 10:20 pm #

    Chocolate cake is always a good thing, but what I like even better is the idea of a just because cake!

  10. Jenny @ BAKE February 26, 2014 at 9:10 am #

    cookie buttercream sounds fantastic! this cake looks beautiful!

  11. Jersey Girl Cooks February 26, 2014 at 9:13 am #

    The cookie butter sounds great with this dark chocolate cake. Now I am in the mood for something sweet!

  12. Christina @ Sweet Pea's Kitchen February 26, 2014 at 9:38 pm #

    Cookie Butter Buttercream??!! Oh man, that sounds fantastic! Pinned! :)

  13. Dawn February 27, 2014 at 6:07 am #

    What is cookie butter?

    • Keep It Sweet February 27, 2014 at 7:54 am #

      Cookie butter is a speculoos spread sold at Trader Joe’s (there is a picture here). You can also buy the brand Biscoff (like the cookies you get on Delta).

  14. whatjessicabakednext February 27, 2014 at 7:48 am #

    The cake looks super amazing- love that cookie buttercream! All sounds delish! :)

  15. Kiran @ KiranTarun.com February 27, 2014 at 5:38 pm #

    Mmmm…i could never resist a decadent dark chocolate cake!


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