Peanut Butter Snack Cake with Bittersweet Ganache

peanut butter cake with chocolate ganache frosting

Peanut Butter Snack Cake with Bittersweet Ganache ~ a moist dense peanut butter cake topped off with the most decadent chocolate frosting imaginable…

peanut butter snack cake with chocolate ganache frosting

How many ways can you combine peanut butter and chocolate? The answer is lots, and I haven’t even begin to scratch the surface.

peanut butter cake with chocolate ganache frosting

When I’m hungry for something sweet, this is the kind of thing I make for myself. Guilt doesn’t play into it at all, and despite that thick layer of bittersweet chocolate ganache it’s not even decadent as desserts go, I’d call it an innocent splurge. That’s why they call it a snack cake 🙂

Peanut Butter Snack Cake with Chocolate Ganache Frosting

This is an easy cake that you don’t even need a mixer for. A whisk and your favorite bowl will do just fine.

making bittersweet ganache

The ganache frosting is even easier. Bitterswweet chocolate and hot cream blend together to make the glossiest concoction ever. Use chocolate chips or chop up your best chocolate, either way works. Ganache is almost magical the way it starts out thin and drippy and as it cools the pourable liquid chocolate thickens into a melt-in-your-mouth truffle consistency. Ganache is my favorite way to experience chocolate, you get the most bang for your buck.

bittersweet chocolate ganache

Fair warning, you might want to make a double batch.

Peanut butter cake with chocolate frosting

The cake is peanut buttery and dense, with a moist fudgy consistency. I like to keep it in the fridge, that way the ganache stays nice and firm. Each bite is a little bit of heaven. Enjoy!

one layer peanut butter cake with ganache frosting

Chocolate Frosted Peanut Butter Snack Cake
3.83 from 29 votes

Peanut Butter Snack Cake with Chocolate Ganache

Peanut Butter Snack Cake with Bittersweet Ganache ~ a moist dense peanut butter cake topped off with the most decadent chocolate frosting imaginable...
Course Dessert, Snack
Cuisine American
Prep Time 20 minutes
Cook Time 35 minutes
Yield 9 -12 servings
Author Sue Moran


  • 1/2 cup 1 stick unsalted butter
  • 1/2 cup peanut butter
  • 1/2 cup boiling water
  • 1 large egg
  • 1/4 cup sour cream
  • 1/2 tsp vanilla extract
  • 1 cup all purpose flour
  • 1 cup sugar
  • 1/2 tsp baking soda

chocolate ganache frosting

  • 1/2 cup heavy cream
  • 1 heaping cup dark chocolate chips


  • Set oven to 350F
  • Spray a 9x9 baking pan lightly with cooking spray.
  • In a mixing bowl blend together the butter, peanut butter, and boiling water until it is completely combined and smooth. (The butter will melt and the mixture will be thin)
  • Beat in the egg, sour cream, and vanilla.
  • Sift in the flour, sugar, and baking soda and mix until well combined, but don't over-beat.
  • Spread into the pan and bake for about 35 minutes or until a toothpick comes out withut wet batter on it.
  • Cool before frosting.
  • To make the frosting, heat the cream in a saucepan just until it comes to a boil. Take the pan off the heat and add the chocolate. Let it sit for a few minutes, then gently stir until all the chocolate has melted and it is smooth and glossy .
  • Let the ganache cool a little so it thickens slightly. I stirred it every few minutes, and when it had thickened a bit I poured it over the cake.
  • Refrigerate the cake until the ganache has set.

Cook's notes

The cake portion of this recipe is adapted from Eat 2 Gather
The nutritional information for recipes on this site is provided as a courtesy and although tries to provide accurate nutritional information, these figures are only estimates.


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    Leave a Reply

    Please rate this recipe!

  • Reply
    June 2, 2015 at 8:21 am

    5 stars
    Made them once and loved them so much I had to make them a second time! So yummy!

    • Reply
      June 2, 2015 at 8:24 am

      Glad to hear it, thanks leslie!

  • Reply
    February 26, 2015 at 8:09 am

    Sue, love this recipe, can it be doubled and baked in 9×13 pan?

    • Reply
      February 26, 2015 at 8:23 am

      I don’t think you should have trouble doing that Kate, but be careful to watch it as it cooks and take it out of the oven as soon as a toothpick comes out clean!

    • Reply
      February 27, 2015 at 12:57 pm

      Thanks! I’ll let you know.

      • Reply
        March 1, 2015 at 2:18 pm

        5 stars
        The recipe doubles beautifully. I make in 9×13 and baked about 5 minutes longer (40 minutes+). It disappeared! Thanks.

        • Reply
          March 1, 2015 at 2:26 pm

          Oh I’m so glad you took the time to let us know, I bet a lot of people will want to do that…thanks Kate!!

  • Reply
    January 25, 2015 at 10:14 am

    Breaking out my bowl and whisk today! This sounds wonderful and easy too.
    Your blog has become one of my favorites. The photgraphs are stunning and the commentary always gives me a chuckle. Thank you.

    • Reply
      January 25, 2015 at 10:36 am

      Thanks Susan! I sure appreciate the support <3

  • Reply
    January 18, 2015 at 1:23 pm

    this looks dense and delicious, sue! the pb and chocolate combo is never disappointing. for the record, ganache is definitely my favorite frosting to make (and probably eat, too!). 🙂

    • Reply
      January 18, 2015 at 3:30 pm

      Nothing compares, does it?

  • Reply
    Jennifer @ Seasons and Suppers
    January 16, 2015 at 4:30 pm

    These are peanut butter/chocolate perfection! (And I would love them cold from the fridge, too!)

  • Reply
    Laura (Tutti Dolci)
    January 16, 2015 at 1:06 pm

    I love that thick layer of ganache, what a perfect snack cake!

  • Reply
    Katie @ Beyond the Clothing
    January 16, 2015 at 12:25 pm

    oh my…. that Ganache! Hubby’s birthday is Monday, which means cake is a requirement this weekend right? This will be perfect. But I wonder what he’ll eat.


  • Reply
    January 16, 2015 at 10:26 am

    Ooh ..that cannot be too bad can it?:)

  • Reply
    [email protected]'s+Recipes
    January 16, 2015 at 7:01 am

    Love that thick layer of ganache topping! Yum!

    • Reply
      January 16, 2015 at 8:34 am

      I know 🙂

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