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Peanut Butter Cake with Peanut Butter Frosting

EVERYDAY TABLE  ·  Nov 6, 2026
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I love how this Peanut Butter Cake with Peanut Butter Frosting is so effortlessly easy to whip up. With simple, familiar ingredients and rich, nutty flavors, it truly stands out!

It all started one cozy afternoon when I stumbled upon a family friend’s handwritten recipe, tucked away in a cookbook my grandmother gifted me. The prospect of enveloping a fluffy cake with my all-time favorite peanut butter frosting drew me in instantly, presenting a delicious challenge that was too tempting to resist.

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This recipe has since become a treasured tradition in my home, celebrated for its simplicity and heavenly richness. Not only is it wonderfully affordable, but it also transforms everyday ingredients into a gourmet indulgence. If you’re looking for a dish that gracefully saves time while offering a truly unique flavor experience, then this recipe is your perfect pick.

Why You’ll Love Peanut Butter Cake with Peanut Butter Frosting?

Let me share why this cake is bound to become your favorite:

  • Simplicity at its Best: With straightforward steps and common pantry ingredients, even a beginner can master this recipe.
  • Rich, Nutty Flavor: Each bite offers a delightful peanut butter punch, pleasing both kids and adults alike.
  • Consistency and Texture: The cake delivers a moist crumb and the frosting adds a smooth, creamy finish.
  • Adaptable Methods: You can switch up the frosting or add some chocolate chips for a fun twist.
  • Time-saving: This cake requires minimal prep and cooks efficiently, making it ideal for last-minute gatherings or quiet family evenings.
  • All Skill Levels Welcome: Whether you’re a seasoned baker or new to the kitchen, this cake promises success every time.

“This is more than just a cake; it’s a peanut butter lover’s dream brought to life with each slice.”

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Ingredients Notes

  • Salted Butter: I find it adds richness and depth. Choose high-fat butter for silky textures. Cut into pieces for even melting.
  • Creamy Peanut Butter: Select a smooth variety for a consistent batter and intense flavor. Avoid natural types to prevent separation.
  • Milk: I use whole milk for creamier results, but any type works depending on dietary preference. It moistens the cake.
  • Vegetable Oil: This keeps the cake moist without overpowering flavors. A neutral oil like canola works best.
  • Vanilla Extract: Real vanilla enhances overall taste. Pure extract, not imitation, gives the best aroma.
  • Large Eggs: They bind the cake together, adding structure. Room temperature eggs mix more evenly into the batter.
  • Yellow Cake Mix: I like using a brand like Duncan Hines for consistency. It serves as a reliable base with its fine texture.
  • Chopped Peanuts: Sprinkling these on adds crunch and texture contrast. Choose fresh nuts for better taste and aroma.
  • Powdered Sugar: For the frosting, it sweetens and thickens. Sifting prevents lumps, ensuring a smooth frosting experience.

How to Make Peanut Butter Cake with Peanut Butter Frosting?

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  • Prepare Your Ingredients: Gather all your ingredients and allow the butter, peanut butter, eggs, and milk to reach room temperature. This ensures smoother batter and frosting.
  • Preheat Your Oven : Set your oven to 350°F (175°C) to ensure a steady temperature once the cake is ready to bake.
  • Mix the Wet Ingredients: In a large bowl, combine the ½ cup salted butter, ⅔ cup creamy peanut butter, and ⅓ cup vegetable oil. Blend until smooth and creamy, creating a rich, aromatic mixture. Add the 1 teaspoon vanilla extract and 2 large eggs, one at a time, mixing well after each addition.
  • Incorporate the Cake Mix: Gradually add the yellow cake mix to the wet ingredients, alternating with the ⅓ cup milk. Stir until the mixture is smooth with no lumps, ensuring an even texture throughout.
  • Bake the Cake: Pour the batter into a greased 9×13 inch baking pan. Smooth the top with a spatula for even baking. Place in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
  • Prepare the Frosting: While the cake bakes, make the frosting by combining ½ cup salted butter and ½ cup creamy peanut butter in a bowl. Gradually mix in 3 ¾ cups powdered sugar and ⅓ cup milk, blending until you reach a smooth, fluffy consistency.
  • Cool and Frost the Cake: Allow the cake to cool completely in the pan. Once cool, spread the peanut butter frosting evenly over the top, creating a velvety finish.
  • Add Final Touches: Sprinkle ⅓ cup chopped peanuts over the frosting for added crunch and a visual appeal that makes this cake irresistible.

Enjoy the delightful marriage of creamy and crunchy textures, with an aroma that fills the kitchen!

Expert Cooking Tips

  • Always use room-temperature butter for a smoother batter and consistent bake.
  • I like to sift my dry ingredients to ensure a lump-free and light cake texture.
  • Use fresh baking powder for effective rising—expired baking powder can lead to a dense cake.
  • Integrate wet and dry ingredients gradually to avoid overmixing, which can lead to a tough texture.
  • Incorporate chocolate chips gently to prevent them from sinking to the bottom.
  • I recommend lining your cake pan with parchment paper for an easy release.
  • Ensure your oven is preheated fully for even and proper baking.
  • Test cake doneness with a toothpick; it should come out with a few moist crumbs.

Storage Tips

  • Allow the cake to cool completely before storing to prevent sogginess.
  • Wrap the cake tightly in plastic wrap or aluminum foil to lock in moisture.
  • Store in an airtight container at room temperature for up to two days.
  • Refrigerate for up to five days to extend the shelf life of your cake.
  • For freezing, wrap individual slices in plastic wrap and then foil to protect against freezer burn.
  • Thaw frozen slices in the refrigerator overnight for best freshness.
  • Reheat slices in the microwave in short intervals, using a damp paper towel to keep them moist.

Variations and Substitutions

  • Substitute almond flour for a gluten-free option; it keeps the cake moist and delicate.
  • For a dairy-free version, use almond milk and coconut oil in place of butter.
  • Add a layer of your favorite fruit jam between the cake layers for a fruity twist.
  • Mix in chopped roasted peanuts for extra crunch and a nutty flavor.
  • Raspberry preserves complement the peanut butter flavor beautifully, adding a touch of tartness.
  • For a chocolate variation, mix cocoa powder into the frosting for a rich chocolate-peanut butter combo.
  • Use white chocolate chips for a sweeter, creamier bite that balances the peanut butter.
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What to Serve with Peanut Butter Cake with Peanut Butter Frosting?

  • Caramelized Banana Slices: Their natural sweetness and velvety texture complement the nutty cake, creating a delectable combination.
  • Creamy Vanilla Ice Cream: A classic pairing, it balances the rich flavors with its cool, smooth consistency.
  • Fresh Fruit Salad: Light and refreshing, it adds a burst of juiciness, balancing the cake’s dense richness.
  • Roasted Pears: The warm, caramelized fruit enriches the cake with a subtly sweet and aromatic contrast.
  • Lemon Sorbet: Its tangy freshness cuts through the sweetness, offering a palate-cleansing contrast.
  • Toasted Almonds: Add a crunchy texture, enhancing the cake’s nutty undertones.
  • Brewed Coffee: Its bitterness complements and balances the sweetness, intensifying the cake’s peanut butter flavor.
  • Apple Cinnamon Compote: Provides a sweet-spicy blend that enhances the cake’s warmth with an aromatic twist.
  • Ginger Snap Cookies: Their spice adds a zesty contrast to the cake’s sweetness.
  • Raspberry Coulis: Offers a tangy, fruity contrast that enhances the peanut and chocolate notes in the cake.

FAQ

Use room-temperature ingredients and avoid over-mixing batter to retain proper cake structure.

Gradually mix in powdered sugar until the desired consistency is achieved.

Yes, bake the cake in advance and frost on the serving day for freshness.

Over-mixing or incorrect ingredient measurements can lead to a dense cake texture.

Reduce sugar by 1/4 cup increments, tasting as you go, to suit preferences.

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THE RECIPE

Peanut Butter Cake with Peanut Butter Frosting

Prep20 min Yield12, 12 servings

Ingredients

Instructions

  1. To prepare this delightful Peanut Butter Cake with Peanut Butter Frosting, start by organizing your workspace. Assemble all your ingredients first. Make sure to leave the butter, peanut butter, eggs, and milk out at room temperature. This step is crucial, as it leads to a smoother batter and perfectly creamy frosting.

  2. Next, fire up your oven. Preheat it to 350°F (175°C) so it’s ready to provide a stable heat once your cake goes in. As you prepare, enjoy the anticipation of creating something deliciously homemade.

  3. Begin by mixing the wet ingredients. In a spacious bowl, blend together ½ cup of salted butter, ⅔ cup of creamy peanut butter, and ⅓ cup of vegetable oil. Aim for a smooth, aromatic mixture that sets a delightful foundation for your cake. Stir in 1 teaspoon of vanilla extract, followed by 2 large eggs, adding them one by one to ensure everything is well combined.

  4. Then, it’s time to incorporate the cake mix. Gradually introduce the yellow cake mix into your wet ingredients, alternating with ⅓ cup of milk. Stir thoroughly until you achieve a lump-free, even batter.

  5. Once your batter is ready, pour it into a well-greased 9×13 inch baking pan. Use a spatula to smooth out the top for an even bake. Place your creation in the preheated oven and let it bake for 25-30 minutes. You’ll know it’s ready when a toothpick comes out clean after being inserted into the center.

  6. While the cake bakes, turn your attention to the frosting. Combine ½ cup of salted butter and ½ cup of creamy peanut butter in a bowl. Gradually add in 3 ¾ cups of powdered sugar and ⅓ cup of milk, blending until you reach a smooth and fluffy consistency.

  7. Once your cake is out of the oven, allow it to cool completely in the pan. This is a pivotal step for ensuring your frosting applies smoothly. Once cooled, spread your peanut butter frosting evenly across the cake, creating a luscious and velvety finish.

  8. For a final flourish, sprinkle ⅓ cup of chopped peanuts over the frosting. This not only adds a delightful crunch but also enhances the cake’s visual appeal. Now, indulge in this delicious treat, savoring the harmonious blend of creamy, crunchy textures and the irresistibly inviting aroma!

Source: www.kitchenmomy.com · Original recipe source.