This Peanut Butter Sheet Cake is a super moist, tender cake with smooth and creamy peanut butter frosting on top. It's easy to whip up and loved by all!Jump to Recipe
Any peanut butter lovers out there?! Well hello and nice to meet you! 😉 This easy cake recipe is right up your alley - a peanut butter lover's dream come true!!
Have you ever had a Texas Sheet Cake? That's where the inspiration for this came from. I love the moist, tender texture of a Texas sheet cake and thought it would be fun to make a peanut butter version (very similar recipe without the cocoa powder and with the addition of peanut butter)!
I thought it would be good, but never dreamed it would be THIS GOOD. Seriously, it's absolutely heavenly!!
Ingredients Needed for the Cake
- All-Purpose Flour
- White Sugar
- Brown Sugar - Light or dark brown sugar will work great.
- Baking Soda
- Butter - I use salted butter in this recipe.
- Peanut Butter - I recommend using regular, full fat peanut butter for this recipe; I do not recommend using natural peanut butter or crunchy style peanut butter as it will change the texture of the cake.
- Buttermilk - You can use buttermilk from the grocery store or make your own with milk and vinegar (details in recipe card notes below).
- Vanilla Extract
- Eggs - I use "large" eggs when baking.
- Powdered Sugar - Also known as confectioners sugar.
- Milk - You could also use heavy cream.
How to Make Peanut Butter Sheet Cake
Make the Peanut Butter Cake Batter
I like to start by preparing my pan and turning on the oven so it's nice and hot when the cake is ready to pop into the oven.
To make the batter, you'll start by adding the dry ingredients to a large mixing bowl.
Next, you'll add the butter, water and peanut butter to a saucepan and place it over medium heat. Stir occasionally until the mixture comes to a boil.
Pour this mixture over the dry ingredients and stir.
Then, you'll whisk together remaining wet ingredients in a separate bowl and pour it into the cake batter.
Whisk until it's completely mixed, pour into the prepared pan and bake!
Peanut Butter Cake Frosting
I decided to go with a peanut butter frosting to really bring home the peanut butter flavor!! However, a chocolate frosting would be incredible as well if you want to go that route!
For the frosting, you'll need butter (be sure it's softened), creamy peanut butter, powdered sugar, vanilla and milk.
When making the frosting, I find it easiest to use a large bowl with a hand mixer or my handy dandy KitchenAid stand mixer. Either way, you'll start by beating the butter and peanut butter until it's nice and smooth. Nobody wants chunks of butter in their frosting!
Next, you'll add half of the powdered sugar and the vanilla. Once smooth, you'll add the remaining powdered sugar and enough milk to make a smooth, creamy spreading consistency.
You can either carefully spread it over a warm cake (the butter will melt and make it a yummy warm icing OR let the cake cool and spread it nicely over the cake (which is what I did).
Frequently Asked Questions
I added a few chopped salted peanuts on top of the cake for a simple look and a little added crunch. You could also sprinkle it with mini chocolate chips, crushed peanut butter cookies (I love the crunch of Nutter Butter cookies!), chocolate sprinkles or colored sprinkles!
You can cover the pan with a tight-fitting lid or cover with plastic wrap. It'll stay good at room temperature for up to 3 days.
Absolutely!! You can freeze slices of the cake in an airtight container or in freezer bags for up to 2 months. If you stack the cake, be sure to add a piece of parchment paper between layers so the frosting doesn't stick together.
Though I prefer the thicker style of this cake, it can certainly be made in a jelly roll or sheet pan and still be a deliciously moist cake. It'll take several minutes less time in the oven, so be sure to make note of that.
It reminds me of the flavor of my No Bake Peanut Butter Pie. The cake portion is very moist and reminiscent of a Texas Sheet Cake while the frosting reminds me more of a peanut butter fudge; smooth, creamy and decadent!