Irresistible Old Fashioned Peanut Butter Cake with Warm Frosting

There s something irresistibly nostalgic about the warm aroma of baking peanut butter cake wafting through the house. I first discovered this Old Fashioned Peanut Butter Sheet Cake during a sunny summer barbecue, where friends gathered and laughter filled the air. The moment my fork sank into that moist, pillowy slice, I knew I d stumbled upon a treasure. Each bite brings a delightful balance of rich peanut flavor without overwhelming sweetness, making it a perfect treat for any occasion from casual weeknight dinners to festive potlucks.

What truly sets this cake apart is its unique warm pourable peanut frosting, which crisps just enough to add a fudgy charm. Whether you’re a peanut lover or just someone who appreciates homemade comfort food, this cake is sure to impress and provide a smile to every guest. Let s dive into this easy and crowd-pleasing recipe that s bound to become a staple in your dessert repertoire!

Save

this Recipe

Why is Old Fashioned Peanut Butter Cake Irresistible?

Nostalgic Charm: This cake brings back cherished memories with its warm and inviting aroma that fills your kitchen.
Moist Texture: Each slice is soft and pillowy, perfect for satisfying any sweet cravings.
Unique Frosting: The warm pourable peanut frosting adds a delightful richness, elevating your dessert game.
Crowd-Pleaser: Ideal for gatherings, it serves up to 24 people, making it perfect for potlucks and celebrations.
Versatile Recipe: Enjoy it as-is or customize it with chocolate chips for an exciting twist!

Old Fashioned Peanut Butter Cake Ingredients

For the Cake
All-purpose flour Provides structure; gluten-free flour can be used as a substitute; adjust for binding and consistency.
Granulated sugar Adds sweetness and moisture; consider coconut sugar for a lower glycemic option.
Baking soda Leavening agent for rise; ensure freshness for best results.
Salt Enhances flavor; use kosher salt for a cleaner taste.
Unsalted butter Adds richness and moisture; can substitute with margarine for a dairy-free option.
Water Hydrates the batter; for a richer flavor, replace with milk.
Creamy peanut butter Main flavor component; chunky peanut butter can be used in the cake for added texture, but avoid natural brands in frosting.
Vegetable oil Keeps the cake moist; swap with melted coconut oil for a different flavor.
Large eggs (room temperature) Binds the ingredients; substitute with flax eggs for vegan options.
Buttermilk (room temperature) Provides tenderness and subtle tang; mix milk with vinegar for a homemade version.
Vanilla extract Adds flavor depth; using pure vanilla will yield the best results.

For the Frosting
Unsalted butter Contributes to the creamy texture; can be substituted with margarine for a dairy-free option.
Creamy peanut butter Essential for that delicious peanut flavor; avoid natural varieties as they may affect consistency.
Buttermilk Adds moisture and tang; adjust the quantity for desired pourable consistency.
Vanilla extract Provides an additional flavor layer; opt for pure vanilla for richness.
Confectioner s sugar Sweetens and thickens frosting; reduce sugar for a less sweet finish.

For Garnish
Roasted peanuts A delightful garnish for crunch and presentation; optional to omit for nut allergies.

With these carefully selected ingredients, your Old Fashioned Peanut Butter Cake is bound to bring joy and nostalgia to your dessert table!

How to Make Old Fashioned Peanut Butter Cake

1. Preheat the oven to 350°F. Prepare a 9×13 baking pan by greasing it lightly with non-stick spray. This ensures your cake won t stick and will come out perfectly intact.

2. Whisk together the dry ingredients in a medium bowl: flour, sugar, baking soda, and salt. Mix thoroughly until well blended, as this will provide a solid base for your cake.

3. Boil butter and water in a saucepan over medium heat. Once it reaches a boil, promptly remove from heat and whisk in the creamy peanut butter and vegetable oil until smooth and combined.

4. Cool slightly the mixture before adding eggs, buttermilk, and vanilla extract. Stir well to combine everything, ensuring your batter will be rich and flavorful.

5. Combine the wet and dry ingredients gently. Use a whisk to mix until just combined, being careful not to overmix for a light, fluffy texture.

6. Pour the batter into the prepared pan. Bake in the preheated oven for 40-45 minutes. The cake is done when the top is golden brown, and a toothpick inserted comes out clean.

7. Make the frosting by boiling butter, peanut butter, and buttermilk in a saucepan. Remove from heat, then mix in vanilla and sifted confectioner s sugar until smooth and creamy.

8. Pour the warm frosting over the cake while it s still hot, allowing it to soak in slightly. Top with roasted peanuts for crunch and presentation.

Optional: Serve warm for a gooey frosting delight.

Exact quantities are listed in the recipe card below.

Save

Make Ahead Options

These Old Fashioned Peanut Butter Cakes are perfect for meal prep enthusiasts! You can make the batter up to 24 hours in advance and store it in the refrigerator to keep it fresh. Simply prepare the cake batter as directed, cover it tightly with plastic wrap, and refrigerate until you’re ready to bake. The frosting can also be made up to 3 days ahead; just keep it in an airtight container in the fridge. When you’re ready to serve, bake the cake, and then warm the frosting on the stove for a few minutes to achieve the ideal pourable consistency. This way, you’ll have a delicious dessert ready with minimal last-minute effort!

Storage Tips for Old Fashioned Peanut Butter Cake

• Room Temperature: Store the cooled cake in an airtight container at room temperature for up to 3 days. This keeps it soft and flavorful, ready to enjoy at a moment’s notice.

• Fridge: If you prefer to extend its life, refrigerate the cake for up to a week in an airtight container. Just remember to bring it to room temperature before serving for the best texture.

• Freezer: For long-term storage, wrap the cake tightly in plastic wrap and then in aluminum foil. It can be frozen for up to 3 months, preserving its delightful peanut butter flavor.

• Reheating: To enjoy leftovers, pop a slice in the microwave for about 10-15 seconds. This will warm it up perfectly, especially if you want to enjoy it with a scoop of ice cream!

Expert Tips for Old Fashioned Peanut Butter Cake

• Work Quickly: Pour the warm frosting over the cake right after it’s finished baking, as it sets quickly and creates a perfect layer of fudgy goodness.

• Adjust Frosting Thickness: If your frosting is too thick, don’t hesitate to add a splash of buttermilk to achieve a smoother, pourable consistency.

• Avoid Natural Peanut Butter: For the frosting, use creamy peanut butter rather than natural brands, which can result in a grainy texture.

• Egg Temperature Matters: Make sure your eggs are at room temperature to help them emulsify better, contributing to the cake’s moistness.

• Flavor Variations: Feel free to mix in chocolate chips to the batter for a delicious chocolate-peanut butter combination that will surprise your guests!

• Check Baking Time: Keep an eye on the cake in the oven; check for doneness around the 40-minute mark to ensure a perfectly baked Old Fashioned Peanut Butter Cake.

Old Fashioned Peanut Butter Cake Variations

Get creative with your baking by personalizing this delightful recipe to your taste and dietary needs!

• Gluten-Free: Substitute all-purpose flour with a gluten-free blend for your cake to accommodate gluten sensitivities without losing flavor.
• Vegan: Replace eggs with flax eggs and use almond milk instead of buttermilk for a fully plant-based version. You’ll gain a new audience with this crowd-pleaser!
• Chocolate Lovers: Add 1 cup of mini chocolate chips to your batter for a rich chocolate-peanut butter fusion. The result is utterly decadent!
• Nut-Free: Use sunflower seed butter instead of peanut butter, and skip the garnish to create a friendly version for nut allergies. It s a soothing option for school celebrations!
• Fruity Twist: Fold in some mashed ripe bananas or applesauce into the batter for a delightful fruity finish, adding moisture and a bit of natural sweetness.
• Spiced Up: Sprinkle cinnamon or nutmeg into the batter for a warm, cozy flavor, elevating your cake to a delightful new dimension.
• Salted Caramel Drizzle: After frosting, drizzle with warm salted caramel to take indulgence to another level definitely worthy of any celebration!
• Extra Crunchy: Mix in chopped peanuts to the batter for an inviting textural contrast that enhances the overall peanut experience. Each bite will be a delightful surprise!

What to Serve with Old Fashioned Peanut Butter Cake?

There s nothing quite like pairing a slice of warm cake with perfect complements that enhance the experience.

• Vanilla Ice Cream: This classic pairing with its creamy, cold finish beautifully contrasts the warm, rich flavors of the cake.
• Fresh Berries: Juicy strawberries or raspberries add a fresh, tangy burst, balancing the sweetness delightfully. Their vibrant color also makes for a stunning presentation!
• Chocolate Sauce: Drizzling warm chocolate sauce brings an indulgent richness, creating an irresistible chocolate-peanut butter harmony.
• Coffee: A steaming cup of coffee, with its robust flavor, perfectly offsets the sweetness of the cake and enhances your dessert moment.
• Whipped Cream: Light and fluffy, whipped cream adds a luscious texture while smoothing out the cake’s decadent richness.
• Chopped Nuts: Sprinkle some salted peanuts on top for a crunchy texture that complements the soft cake and frosting beautifully.
• Milk: A tall glass of cold milk is a nostalgic and satisfying drink, washing down every peanutty bite with ease.
• Peanut Butter Cup Sundae: Transform leftover cake into a sundae by layering with ice cream and drizzling with peanut butter sauce for a delightful dessert mash-up.
• Chocolate Milkshake: This indulgent treat combines classic flavors, providing a rich and creamy pairing that will please even the pickiest eater.
• Honey Drizzle: A drizzle of honey adds a floral sweetness that elevates the entire dessert experience and pairs exceptionally well with peanut butter.

Save

Old Fashioned Peanut Butter Cake Recipe FAQs

How do I choose the best peanut butter for the cake?
Absolutely! When selecting peanut butter, go for a creamy variety that s free from added sugars or oils. Avoid natural brands with oil separation as they can lead to a grainy texture in the frosting. I often use a classic creamy peanut butter that blends seamlessly into the cake batter, ensuring a rich flavor without overwhelming sweetness.

What is the best way to store Old Fashioned Peanut Butter Cake?
To maintain its moistness, store your cooled cake in an airtight container at room temperature for up to 3 days. If you’re planning to keep it longer, refrigerate it in an airtight container for up to a week. For freezing, wrap it tightly in plastic wrap followed by aluminum foil to protect it from freezer burn; it can last for up to 3 months without losing its delicious flavor.

Can I freeze Old Fashioned Peanut Butter Cake?
Yes, the Old Fashioned Peanut Butter Cake freezes beautifully! Here s how to do it step-by-step:

1. Allow the cake to cool completely.
2. Wrap the entire cake tightly in plastic wrap to prevent air exposure.
3. Next, wrap it again in aluminum foil for added protection.
4. Label the package with the date, then place it in the freezer.
   When you’re ready to enjoy it, thaw it overnight in the refrigerator and bring it to room temperature before serving.

Why is my frosting too thick, and how can I fix it?
If your frosting is too thick, don t fret! Simply add a splash of buttermilk, one tablespoon at a time, until you reach your desired pourable consistency. Mixing the frosting over low heat can also help loosen it up. Remember, working quickly while the frosting is warm will yield the best results, as it sets quite fast!

Can I make this cake gluten-free?
Very much so! To make an Old Fashioned Peanut Butter Cake gluten-free, substitute the all-purpose flour with a gluten-free flour blend. Be sure to check if any additional binding agents are required; sometimes adding a tablespoon of xanthan gum helps achieve that perfect, fluffy texture. Your loved ones won t even notice the difference!

Is this cake safe for pets, especially dogs?
While this cake is delicious for humans, the peanut butter used should be checked for xylitol, an ingredient dangerous for dogs. It s always best to keep our furry friends in mind when baking. If you want to share a little love with your pup, consider using plain, unsalted peanut butter without any added ingredients. Always consult your vet if unsure!