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the best old-fashioned Peanut Butter Cake (with coffee buttercream)

This Peanut Butter Cake recipe is in partnership with Bob’s Red Mill, all opinions are our own.

This old-fashioned Peanut Butter Cake brings the best of creamy peanut butter and sweet cake together in an all-time family favorite! This recipe comes together quickly and makes a good-sized sheet cake perfect for sharing. Paired with coffee frosting to accentuate the peanut butter flavor in the BEST way!

the very best old-fashioned peanut butter cake

My son Levi will single-handedly consume a good half of this cake in a single day if I’m not careful. He loves loves this cake!

Not to say that the rest of us don’t think it’s super yummy, as well. He just REALLY loves it. A lot.

Peanut Butter Cake recipe

Evoking a bit of warmth, comfort, and childlikeness, this peanut butter cake provides the perfect bite of sweet, salty, and smooth all at the same time. Serve it with a glass of milk or coffee just like Grandma would have!

Peanut Butter Cake

Every cake recipe I make starts with the very best ingredients. You all know, by now, that I’m a huge fan of Bob’s Red Mill and their organic All-Purpose Flour. Truly, great ingredients make great food.

peanut butter sheet cake recipe

Giant families rarely have time or budgets for pretty and delicate recipes. As the oldest of 10, I grew up thinking sheet cakes were the gold standards. Layer cakes weren’t something that presented themselves very often in my world. Sheet cakesย or 9 by 13 cakes made appearances at almost every family event or function because they were budget-friendly and convenient for feeding large groups.

This peanut butter cake bakes up in a sheet cake just like those cakes I grew up with. This cake serves a lot of people, bakes up quickly, is easy to frost, and easy to transport. Plus….gobs of flavor just ooze out of it! For my family, this cake checks all the boxes.

old-fashioned peanut butter cake recipe

That frosting has coffee in it! Not jokingย in the least. Espresso and peanut butter pair up brilliantly together to make the most flavorful punch in the mouth without tons of effort.

Trust me on this, a bit of coffee in your frosting (and the cake, too) punches up the peanut butter flavor to a new level.

peanut butter cake recipe

All those good ingredients like Bob’s Red Mill flour, smooth peanut butter, and espresso combine into one silly stupid cake that gets you recipe requests everytime you make it.

I top it with crushed salted peanuts which adds yummy texture and delicious salted peanut goodness. Frankly, don’t skip the peanut toppings. You will thank me later!

peanut butter cake

If you come over to my house for the first time, I would pour you up a cup of hot coffee and serve you a piece of this cake. All the comfort, warmth, welcome, and love that I hope you feel in my home comes through in this cake.

peanut butter cake
5 from 3 votes
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Peanut Butter Cake

the best old-fashioned Peanut Butter cake full of smooth creamy peanut butter flavor and coffee frosting that creates the BEST flavor combo!

Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 40 minutes
Servings 12 servings

Ingredients

  • 2 cups Bob's Red Mill All-Purpose flour
  • 1 cups white sugar
  • 1 cup brown sugar
  • 1 teaspoon baking soda
  • 1 teaspoon salt
  • 1 cup hot coffee
  • 1/2 cup butter, melted
  • 1/2 cup peanut butter
  • 1/2 cup oil
  • 2 eggs room temperature
  • 1/2 cup buttermilk
  • 1 teaspoon vanilla

Coffee Buttercream

  • 2 sticks butter, softened unsalted
  • 2 cups powdered sugar add up to an additional 1/2 cup until desired consistency is achieved
  • 3 tablespoons strong coffee

Instructions

  1. Preheat the oven to 350 degrees. 

  2. Grease a 1/2 sheet pan or 9 by 13 cake pan.

  3. Mix dry ingredients in a small bowl.

  4. Whisk the coffee and butter together in a large bowl.

  5. Add peanut butter and oil to the coffee and butter, whisk until smooth.

  6. Add milk, vanilla, and eggs to the coffee mixture. Whisk well.

  7. Incorporate the dry ingredients a little at a time. Mix well.

  8. Pour into the prepared pan and bake for 30 minutes for a sheet cake and 40 minutes for a 9 by 13 pan. Check for doneness with a toothpick or knife entered into the center that comes out clean.

  9. Frost with coffee buttercream and top with crushed salted peanuts.

Coffee Buttercream

  1. Beat the butter until light and fluffy. 

  2. Add the powdered sugar a bit at a time.

  3. Add the coffee until the desired consistency is achieved.

Other homemade cakes you’ll love:

Lemon Sponge Cake with Rosemary Buttercream

Old-fashioned Brownie Cake

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6 Comments

  1. November 20, 2018 / 12:41 pm

    WOW! This looks and sounds amazing. I can’t wait to make it! Saving it to my favorite desserts board on Pinterest.

    • Nellie
      Author
      November 20, 2018 / 5:48 pm

      Thanks so much!! I appreciate the share!

  2. November 20, 2018 / 11:28 am

    Oh my goodness… this looks absolutely WONDERFUL! I think my biggest challenge with it would be “Milk or coffee to drink with it?” Heck, I’d just have to eat two slices. One with milk and one with coffee. LOL!

    • Nellie
      Author
      November 20, 2018 / 5:48 pm

      Heck yes! Thanks so much. Someday we shall share this yummy cake in person :)

  3. Karen
    November 14, 2018 / 6:14 pm

    Looks delicious. Recipe doesnโ€™t say how much peanut butter. ???

    • Nellie
      Author
      November 15, 2018 / 9:40 am

      Oh for Pete’s sake! Thanks for the heads up.

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