three layer chocolate peanut butter cake

Hello friends,

I come to you today with my first celebration cake post, and let me tell you, this cake is no joke. Three layers of rich sour cream chocolate cake with thick peanut butter cream cheese frosting between each layer and all over the outside.

It was my housemate Meg’s 21st birthday, and I was given the important task of making her an epic birthday cake. Her two favorite foods are chocolate and peanut butter, so this cake was a natural choice. I had been eyeing it for months on Smitten Kitchen, but before settling I decided to check out chocolate peanut butter cakes on my other favorite blogs and what did I find? They were all copy cats of this same smitten kitchen recipe! I decided that it must be good if everyone else had made it, and I wasn’t wrong!

I will admit, this isn’t the cake I would choose off a dessert menu. I’m more of a creme brulee or cheesecake with berry compote sort of girl, but boy let me tell you, it was far from a chore to eat a piece of this. Everyone at the party LOVED it and I have been asked for the recipe on more than one occasion since then. So drum roll ladies and gentlemen, here it is:

3-Layer Chocolate Peanut Butter Cake

Courtesy of Smitten Kitchen (thanks Deb!!)

Chefs Notes: The original recipe calls for a chocolate peanut butter glaze on top of the peanut butter frosting, which I didn’t do, but I will give you the ingredients for in case you want to add it on. The recipe makes an 8-inch triple layer cake which will easily serve over 16 people because it is VERY rich and should be served in very skinny slices.

  • 2 cups all-purpose flour
  • 2 1/2 cups sugar
  • 3/4 cup unsweetened cocoa powder
  • 2 teaspoons baking soda
  • 1 teaspoon salt
  • 1 cup vegetable/canola/soybean oil
  • 1 cup sour cream
  • 1 1/2 cups water
  • 2 tablespoons distilled white vinegar
  • 1 teaspoon vanilla extract
  • 2 eggs
  • peanut brittle, broken into pieces (optional)

1. Preheat the oven to 350 degrees F. Butter the bottoms and sides of three 8-inch round cakepans. Line the bottom of each pan with a round of parchment or waxed paper and butter the paper.

2. Sift the flour, sugar, cocoa powder, baking soda, and salt into a large bowl. Whisk to combine them well. Add the oil and sour cream and whisk to blend. Gradually beat in the water. Blend in the vinegar and vanilla. Whisk in the eggs and beat until well blended. Scrape down the sides of the bowl and be sure the batter is well mixed. Divide among the 3 prepared cake pans.

3. Bake for 30 to 35 minutes, or until a cake tester or wooden toothpick inserted in the center comes out almost clean. Let cool in the pans for about 20 minutes. Invert onto wire racks, carefully peel off the paper liners, and let cool completely. (Deb recommended putting these cakes in the freezer for around 30 minutes once out of the oven to firm up a bit because they are very soft. They’ll defrost quickly once assembled. I did this and found it very helpful, especially with assembling and then frosting the cake.)

4. To frost the cake, place one layer, flat side up, on a cake stand or large serving plate. Spread 2/3 cup cup of the Peanut Butter Frosting evenly over the top. Repeat with the next layer. Place the last layer on top and frost the top and sides of the cake with the remaining frosting. (Deb recommends making a crumb coat of frosting–a thin layer that binds the dark crumbs to the cake so they don’t show up in the final outer frosting layer,  which is a great idea for this cake, or any with a dark cake and lighter-colored frosting. Once you “mask” your cake, let it chill for 15 to 30 minutes until firm, then use the remainder of the frosting to create a smooth final coating. Once the cake is fully frosted, it helps to chill it again and let it firm up. The cooler and more set the peanut butter frosting is, the better drip effect you’ll get from the Chocolate-Peanut Butter Glaze.)

Optional Step:

5. To decorate with the Chocolate–Peanut Butter Glaze, put the cake plate on a large baking sheet to catch any drips. Simply pour the glaze over the top of the cake, and using an offset spatula, spread it evenly over the top just to the edges so that it runs down the sides of the cake in long drips. Refrigerate, uncovered, for at least 30 minutes to allow the glaze and frosting to set completely. Remove about 1 hour before serving. Decorate the top with chopped peanut brittle.

Peanut Butter Frosting


Makes about 5 cups

  • 10 ounces cream cheese, at room temperature
  • 1 stick (4 ounces) unsalted butter, at room temperature
  • 5 cups confectioners’ sugar, sifted
  • 2/3 cup smooth peanut butter, preferably a commercial brand (because oil doesn’t separate out) Note: I used chunky peanut butter which is why you will see chunks of peanuts in my frosting. It was what I had around the house and worked perfectly as well.

1. In a large bowl with an electric mixer, beat the cream cheese and butter until light and fluffy. Gradually add the confectioners’ sugar 1 cup at a time, mixing thoroughly after each addition and scraping down the sides of the bowl often. Continue to beat on medium speed until light and fluffy, 3 to 4 minutes.

2. Add the peanut butter and beat until thoroughly blended.

Chocolate-Peanut Butter Glaze
Makes about 1 1/2 cups

  • 8 ounces semisweet chocolate, coarsely chopped
  • 3 tablespoons smooth peanut butter
  • 2 tablespoons light corn syrup
  • 1/2 cup half-and-half

1. In the top of a double boiler or in a bowl set over simmering water, combine the chocolate, peanut butter, and corn syrup. Cook, whisking often, until the chocolate is melted and the mixture is smooth.

2. Remove from the heat and whisk in the half-and-half, beating until smooth. Use while still warm.

The Birthday Girl

Make this cake for a friend’s birthday (or really anytime) for a very special and highly addictive treat! Let me know how it goes!

Cheers,

E

One response to “three layer chocolate peanut butter cake

  1. Looks YUMMY!!!

Let me know how the recipe turned out for you!