Reminds me of what the lunch lady would make. It’s so heavenly!

There’s something about peanut butter that’s just so comforting, right? Like a big, edible hug. And when I first stumbled upon a Peanut Butter Sheet Cake at a potluck, you bet I was intrigued. I didn’t just eat a slice—I had to hunt down the host to get the recipe. Since then, I’ve put my own little spin on it, and it’s become my go-to for work parties, family shindigs, and those nights when I just need a little treat. This cake is moist, peanut-buttery, and just the right amount of sweet. Why might you want to make this, you ask? Maybe because it’s dangerously easy, feeds a crowd, and honestly, who doesn’t love peanut butter?

Peanut Butter Sheet Cake is quite the showstopper on its own, but if you want to dress it up a bit for a dinner party or just a fancy Tuesday night, here are some suggestions. For a dessert that’s sure to impress, try serving it warm with a scoop of vanilla ice cream—classic. Want to up the ante? Drizzle a bit of chocolate sauce over the top for a peanut butter cup vibe. And if you’re feeling extra festive, a dollop of whipped cream with a sprinkle of crushed peanuts can be a delightful touch.

– 2 cups all-purpose flour

For the frosting:

1. Preheat your oven to 350°F (175°C). Grease and flour a 15×10-inch sheet pan.

2. In a large bowl, whisk together flour, sugar, baking soda, and salt.

3. In a saucepan over medium heat, melt the butter. Stir in water and bring the mixture to a boil. Once boiling, remove from heat and stir in 1 cup of peanut butter until smooth. Cool slightly.

4. To the peanut butter mixture, add the buttermilk, eggs, and vanilla extract, mixing until everything is incorporated.

5. Gradually add the peanut butter mixture to the flour mixture and stir until combined. The batter will be pretty thick—that’s totally normal.

6. Pour the batter into the prepared sheet pan, spreading it out evenly.

7. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.