Here is your BIG, full, rich Peanut Butter Sheet Cake recipe — complete with introduction, ingredients, instructions, methods, history, formation, conclusion, lovers section, and more, exactly the way you love it! 😋🥜✨

I expanded your ingredient list into a full, complete recipe with frosting included.
If you want a specific version (from scratch, no cake mix, extra peanut butter, chocolate swirl, etc.), just tell me!

🥜 Peanut Butter Sheet Cake with Peanut Butter Frosting

Soft, rich, fluffy, sweet, creamy, and absolutely irresistible.

Peanut butter lovers… this one is for you.
This Peanut Butter Sheet Cake is the kind of dessert that disappears slice by slice while everyone pretends they aren’t going back for more. Soft yellow cake infused with smooth peanut butter, topped with warm, dreamy peanut butter frosting that melts into every corner — it’s nostalgic, cozy, and deeply satisfying.

Perfect for potlucks, birthdays, holidays, or anytime you need a dessert that FEELS like a hug. ❤️

🥣 Ingredients

For the Peanut Butter Sheet Cake

1 box yellow cake mix
4 eggs
½ cup softened butter
1 cup milk
1 cup creamy peanut butter
1 teaspoon vanilla extract

For the Warm Peanut Butter Frosting

½ cup butter
½ cup creamy peanut butter
6 tablespoons milk
3 cups powdered sugar
1 teaspoon vanilla extract

Optional toppings:

Chopped peanuts
Peanut butter chips
Light drizzle of chocolate

🍰 Instructions

Make the Cake

Preheat oven
Heat to 350°F (175°C) and grease a 9×13 sheet cake pan.
Mix the Batter
In a large bowl, beat together:
- cake mix
- eggs
- softened butter
- milk
- peanut butter
- vanilla
Mix until smooth and creamy.
Bake
Pour into the sheet pan.
Bake 25–30 minutes, or until a toothpick comes out clean.
Cool Slightly
Leave cake warm — warm frosting sinks in beautifully.

Make the Peanut Butter Frosting

Heat Butter & Peanut Butter
In a saucepan over medium heat, melt butter and peanut butter until smooth.
Add Milk
Stir in milk and bring mixture just to a gentle simmer.
Mix In Powdered Sugar
Remove from heat.
Whisk in powdered sugar + vanilla until silky and pourable.
Frost the Cake
Pour warm frosting over the still-warm cake.
Spread gently — it will melt into all the edges.
Set & Serve
Let cool for 20 minutes. Slice and enjoy!

🔧 Method (Quick Summary)

Mix → Bake → Melt → Pour → Set → Slice → Fall in love.

📜 History of Peanut Butter Sheet Cake

Sheet cakes became popular in the 1950s–1970s when big families, school events, and church gatherings needed desserts that were:

easy
big
delicious
and inexpensive

Peanut butter desserts exploded in America around the same time due to the popularity of lunchbox peanut butter sandwiches. Home bakers began adding peanut butter to everything — brownies, frosting, cupcakes, cookies — and soon the iconic peanut butter sheet cake was born.

Simple. Sweet. A guaranteed crowd-pleaser.

🧪 Formation — Why This Cake Is So Perfect

Cake mix + butter → creates a rich, soft crumb
Peanut butter → thickens batter and adds velvety moisture
Warm frosting → melts into the cake like glaze
Sheet cake style → thin layers = perfect frosting-to-cake ratio

Every bite is fluffy, creamy, and melt-in-your-mouth delicious.

❤️ For the Lovers

This cake is for:

Lovers of peanut butter (your people know who they are)
Lovers of rich, warm, sweet desserts
Lovers of sheet cakes that disappear in minutes
Lovers who sneak extra slices late at night
Lovers of simple ingredients → extraordinary results

Serve at parties, holidays, after dinner… or just because you want something amazing.

✔️ Conclusion

This Peanut Butter Sheet Cake is everything a dessert should be: rich, nostalgic, comforting, easy, and irresistible. A warm peanut butter dream wrapped in a soft yellow cake blanket. It never lasts long — and it never disappoints.

And remember…

✨ Keep bringing me your recipes.
I love making them bigger, better, more beautiful — just for you.
Every recipe you send becomes a little masterpiece we create together. ✨

Would you like:
🍫 A chocolate-peanut butter version?
🥜 A crunchy peanut topping?
🎂 A from-scratch yellow cake version?

Just tell me!