The Ultimate Peanut Butter Chocolate Cake
So, yeah. This might be a bit over the top. It's also messy, frumpy, and haphazard. But really, who cares? When it comes to chocolate and peanut butter, you just can't go wrong. You…
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The Ultimate Peanut Butter Chocolate Cake
So, yeah. This might be a bit over the top. It's also messy, frumpy, and haphazard. But really, who cares? When it comes to chocolate and peanut butter, you just…
Ingredients
Cake
- 3 cups sugar
- 2 and ⅔ cups all-purpose flour
- 1 and ⅓ cups cocoa powder
- 2 and ¼ teaspoons baking powder
- 2 and ¼ teaspoons baking soda
- 1 and ½ teaspoons salt
- 3 eggs
- 1 and ½ cups milk
- ¾ cup vegetable oil
- 1 Tablespoon vanilla extract
- 1 and ½ cups boiling water
Frosting
- 1 cup (2 sticks) unsalted butter, softened but cool
- 8 oz (1 box) cream cheese, at room temperature
- 1 teaspoon vanilla extract
- 1 and ¼ cup peanut butter
- 4 cups confectioners' sugar
- ¼ cup heavy cream
Ganache topping
- 4 ounces semi-sweet chocolate
- 4 ounces (1/4 cup) unsalted butter
Garnish
- Chopped Reeses Peanut Butter Cup Candies (I used one bag of bite-size and
- 8 full-size cups)
Instructions
Cake
Preheat oven to 350 degrees (F).
Prepare three 8-inch round pans with cooking spray and parchment rounds. Set aside.
In a large mixing bowl, combine all cake ingredients except boiling water (sugar, flour, baking powder, baking soda, salt, eggs, milk, oil, vanilla and cocoa powder.)
With a hand mixer, beat until just combined.
Add boiling water, and carefully beat until just combined again. Use a spatula to clean sides of bowl, and beat one more time.
Evenly distribute batter between three cake pans (I use a kitchen scale to help).
Bake for 30-35 minutes or until a cake-tester comes out clean.
Cool on a wire rack for 15 minutes, then remove cakes from pans and cool completely.
Frosting
In the bowl of a stand mixer fitted with the paddle attachment, beat together butter and cream cheese until smooth and creamy.
Add peanut butter and vanilla, and beat until incorporated. Use a spatula to clean the sides of the bowl, and beat again.
Add confectioners sugar and heavy cream, and beat until smooth.
Ganache
In a heavy-bottomed saucepan, slowly melt butter. Remove from heat.
Immediately add chocolate, and allow the heat to melt the butter, stirring with a rubber spatula until smooth.
Set aside to cool slightly - for about 10 minutes.
Assembly
Once cake is cool, place bottom layer on cake plate.
Using an offset spatula, smooth about a cup of frosting over the cake.
Add second layer, and repeat with another cup of frosting.
Add the top layer. Use the spatula to smooth the frosting around the outside of the cake, and refrigerate for 15 minutes to help solidify the cake layers.
Remove cake from refrigerator, and spoon a large mound of frosting on the top layer (about 2 cups worth) and smooth the frosting over the top and sides of cake. Add more frosting as needed to completely cover the cake.
Smooth frosting into an even layer on the tops and sides.
Return cake to refrigerator for another 15-20 minutes to chill the frosting. Prepare the ganache during this time.
Once chilled, pour the slightly-cooled ganache over top of the cake, slowly, starting in the middle of the cake.
Once the ganache begins to drip over the sides of the cake, stop pouring.
Top with chopped peanut butter cup candies, and drizzle with another bit of ganache.
Refrigerate again for 10-15 minutes.
Cut 8 full-size peanut butter cups in half. Use them to rim the bottom of the cake.




Oh my, cake heaven! Pinned.
Chocolate and peanut butter a match made in heaven.
I usually make ganache using good quality dark chocolate and double cream (I think the US refers to this as heavy cream). Is there a particular reason for using butter? Definitely making this for my hubby’s birthday this coming Monday ~ I know he’ll love it!
Not sure what the reason was behind it – I was a bit skeptical, but it worked and it was delish! 😉
In my youth I worked in a restaurant. We always made ganache with butter. SO GOOD!
That’s a beautiful thing, thanks for sharing and happy belated birthday. I like your writing style.
I made this a couple weeks ago and it was possibly the best chocolate cake I have ever eaten. Everyone loved it. It’s been requested a second time and I’m thinking about doing it in cupcake form. Has anyone done that? I’m wondering how to adjust the baking time and about how many cupcakes it would make?
I made 24 cupcakes and a bundt with one recipe. 20 min was perfect!
i made this cake for my friend’s birthday and it tasted like a piece of heaven, the cake is so rich and moist. it was a big hit! will definitely use this recipe over and over again. i omitted the reeses cups though…
Awesome!! Thanks for coming back by to let me know!!
I was looking for a simple peanut butter frosting recipe and I definitely found it. This stuff is amazing!! It is light and creamy and seriously tastes like heaven. I only made the frosting, but I really wish I had made the cake as well. If you have any reservations about this recipe, don’t. Just make it. You won’t regret it!
Somehow my seventeen year old boyfriend will be turning thirty seven next week. I’m making this cake to distract us from the harsh reality that twenty years have gone by even though it seems like a day (The five children we produced in that “day” will probably love it as much as we’re sure to!)
I made this for my son’s 11th birthday – he loves everything with peanutbutter! It was a huge succes, so I’m making it again for my friend’s birthday tomorrow. Thank you!
Amanda in Copenhagen, Denmark
Although mine wasn’t as beautiful as yours, but the taste was perfect 🙂
do you think that the cake can hold a smaller one on top also with a big rice crispy ball and fondant ?
Thank you! Great recipe! Easy to follow directions worked perfectly! Huge hit! So happy!
Is there any way I can change it to a two layer 8″ cake?
The first recipe I saw for this cake was for 2 8″ layers. It just has 1/3 less of everything in the cake itself: 2 cups sugar, 1 3/4 cups flour, 1 cup cocoa, etc. The frosting ingredients are the same for both recipes (same quantity of frosting for the 2 layer cake as for the 3 layer) except that the 2 layer recipe calls for 3 tablespoons milk in the frosting instead of the cream, and the ganache calls for 8 oz melting chocolate and 6 oz butter. Your call which ganache and which approach to the frosting sounds better, but if you use the ganache ingredients from this recipe, I wouldn’t decrease them for the 2 layer cake.
Oops! I just noticed when you posted this question. I just read it today. Obviously by now you’ve either solved it for yourself or moved on. Maybe someone else will want to know….
Can’t wait to make for my birthday!
I only have 3-9″ cake pans. Can I use them instead of the 8″ pans? I am assuming it would take a shorter time to bake.
My cakes overflowed in the oven. What did I do wrong?
I cant wait to taste it made it for my daughters 14th bday