If you don’t like chocolate or peanut butter, then you’re absolutely not going to like this cake, and I feel bad for you because this cake is delicious!
As you will see shortly, I really enjoy the decorating aspect of making a cake. Obviously, taste is important, but I feel like presentation is just as important! With this cake, I was able to make my first attempt at a “drip” layer and to test out some of my Russian Piping Tips!
Ingredients
Cake
- 1 3/4 c all purpose flour
- 3/4 c cocoa powder (I use Hershey brand)
- 1 3/4 c granulated sugar
- 2 tsp baking soda
- 1 tsp baking powder
- 1 tsp salt
- 1/2 c vegetable oil
- 2 large eggs
- 3/4 c sour cream
- 1/2 c buttermilk
- 2 tsp vanilla extract
- 1/2 c strong coffee*
Chocolate Ganache**
- 1/2 – 1 c chocolate chips
- 1/2 – 1 c heavy cream
Frosting
- 10 tbsp unsalted butter
- 2 c peanut butter
- 2 c powder sugar
- 2/3 c heavy cream
- 2 tsp vanilla extract
- 1/2 tsp salt
Decorating
- 4 pack of Reeses
- Reeses pieces
- Resses minatures
*Note: Even though you are adding coffee, you will not taste it! It brings out the chocolate flavor in the cake.
**Note: The ganache is essentially a 1:1 ratio of chocolate:heavy cream. Adjusted how much heavy cream you use based on how much chocolate. For this cake, I used 1 cup of both but ended up not using it all. I would start with 1/2 a cup and make more if needed; it only takes a few minutes to prepare!

Directions
Cake
- Allow all ingredients to get to room temperature before starting
- Preheat the oven to 350°
- Prep two 9″ cake pans:
- Rub an even coating of butter around the edges and bottom
- Sprinkle some flour in the pan and spread it around the pan so it’s completely covered
- As an extra precaution, you can put some parchment paper on the bottom of the pan as well
- In a large bowl or bowl of stand mixer, whisk together: flour, cocoa powder, sugar, baking soda, baking powder and salt
- In a medium bowl, mix together: vegetable oil, eggs, sour cream, buttermilk and vanilla.
- Combine the wet ingredients into the dry and mix until fully combined
- Slowly add in the coffee with the mixer running
- Separate the batter into the two prepared pans
- Bake for 20 minutes, or until a toothpick in the center comes out clean
- Allow the cakes to cool in the pan on a wire rack for 20 minutes
- Transfer the cake from the pan to the wire rack and allow it to cool completely
- If you are going to let it sit in the fridge overnight, cover the cake on the wire rack loosely with plastic wrap before putting it in the fridge
Frosting
- Allow the butter to soften (1-2 hours on the counter) before starting
- Using a hand mixer or stand mixer, beat the butter until creamy
- Add the remaining ingredients
- Mix on low until everything is combined
- I kept turning my stand mixer on in short bursts (about 10 seconds on) until the powder sugar was decently combined. This prevented a giant cloud of powdered sugar from puffing out of the stand mixer
- Beat on high for 3 minutes straight
- Scrape down the sides and bottom to ensure everything got mixed in. If not, allow it to run on medium for another minute
Ganache
- Using a double boiler:
- Heat the water till it’s boiling
- Place an equal ratio of chocolate and heavy cream in a bowl and place it on top of the pot
- Cook the chocolate mixture until it is completely melted
- Allow the chocolate to cool for 5-10 minutes, until it’s slightly thickened before putting on the cake
- Using the microwave:
- Heat the chocolate/heavy cream mixture in the microwave in 20-second increments, stirring after each time until it is completely melted
- Allow the chocolate to cool for 5-10 minutes, until it’s slightly thickened before putting on the cake
Cake Tips!
- PREP YOUR PANS!!!! Proper prep will save you trouble later on
- Make the cake the day before so it can cool completely on the counter and then sit in the fridge overnight before frosting
- Extra frosting is always better than not enough! Make a little more to begin with rather than having to make multiple batches
- When doing ganache, wait until the chocolate has thickened slightly before you try to drizzle it. This will allow for a better drip (I did not do this, that’s why mine went all the way to the cake board)
- Let the ganache set in the fridge before decorating the top of the cake
- Have fun with the decorating!

Test Kitchen: Opinion and Changes
The recipe for the cake and frosting came from Sallie’s Baking Addiction. I originally tried a different chocolate cake recipe that also used coffee, but it used 1 c and gave the cake a strange scent.
Although I did not make any changes to the recipes, I noticed that the cake batter only made enough for two layers, when it was supposed to make three. Also, I had to double the amount of frosting in order to cover the cake.
Happy Baking!
It looks lovely.
LikeLike