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Peanut Butter Sheet Cake

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This easy and peanut buttery cake is perfect for feeding a crowd.  It is made much like a Texas sheet cake and would be good with that chocolate icing, but we love it with white chocolate buttercream for an extra special treat!

piece of frosted peanut butter sheet cake being lifted out of pan.

This fun sheet cake is full of peanut butter flavor.  It is made in the Texas sheet cake style where you boil the butter and water on the stove, so there is no need for creaming or fussing to get it together. 

Plus it is a great size for sharing, but don’t worry it will disappear quickly.  I made it as one of the treats at Little Dude’s second birthday and thought it was time to remake the recipe, shoot some quick pictures and update the post a bit.

For one of Little Dude’s birthday cakes, I thought it would be fun to do a sheet cake with one of his favorite flavors… peanut butter!   I loved the idea of making a sheet cake.

The fact that the cake isn’t as thick as a traditional cake makes it so people could just have a little bit if they wanted or as much as they please.

Added bonus: I could pile it high with white chocolate buttercream! A few sprinkles around the side and a birthday cake is born.

pouring peanut butter cake batter into sheet pan.

One of our favorite parts about baking sheet cakes is they don’t take any special equipment.  Just a sauce pan, a couple of bowl and the sheet cake pan.

No need for the mixer, which is good because I only wanted to wash it so many times for this one party! Plus there is the added bonus that you don’t have to bring your ingredients to room temperature.

peanut butter sheet cake fresh from the oven.

This cake has been a hit every time I have made it.  This most recent time one of my brothers took a bite and said it tasted like Reese’s cereal.  It kind of does! But in a much softer cakier kind of way!

So if you are half the peanut butter fans we are, you should definitely give this cake a go.  The size makes it perfect for a potluck, BBQ or party and the fact that in can go from idea to coming out of the oven in less than 45 minutes is nice too.  There’s no waiting for the butter to soften to be able to cream it!

fork taking bite of peanut butter sheet cake with fluffy white chocolate frosting.

More great peanut butter recipes

Some of our other favorite peanut butter treats are Emily’s no-bake peanut butter bars.  We had some again last weekend and they were a hit with my husband yet again! We also loved the peanut butter chocolate chip no churn ice cream

For a fun sweet and salty treat, try making peanut butter pie with a chocolate covered pretzel crust. Peanut butter popcorn or peanut butter chocolate chip cookies would be wonderful as well.

For a healthier treat, we love the peanut butter and yogurt fruit dip and it really doesn’t get much easier than that to make either!  What are your favorite peanut butter treats?

Love this recipe? Give it a ⭐⭐⭐⭐⭐ review in the recipe card below!

piece of frosted peanut butter sheet cake being lifted out of pan.

Peanut Butter Sheet Cake

This easy and peanut buttery cake is perfect for feeding a crowd. It is made much like a Texas sheet cake and would be good with that chocolate icing, but we love it with white chocolate buttercream for an extra special treat!
5 from 5 ratings
Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Course Dessert
Cuisine American
Servings 24 Servings
Calories 231 kcal


  • cups all purpose flour
  • 2 cups granulated sugar
  • ¼ teaspoon salt
  • 1 teaspoon baking soda
  • ½ cup milk
  • 1 teaspoon vinegar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup butter
  • cup peanut butter
  • 1 cup hot water
Makes: 13 x 18inch rectangle1inch height


  • Preheat oven to 350°F
  • In a large bowl, mix together flour, sugar, salt and baking soda.
    2½ cups all purpose flour, 2 cups granulated sugar, ¼ teaspoon salt, 1 teaspoon baking soda
  • In a small bowl, mix together milk and vinegar.
    ½ cup milk, 1 teaspoon vinegar
  • In a saucepan, melt butter over low heat. Stir in peanut butter until smooth and melted. Mix in hot water, bring to a bubble and remove from heat.
    1 cup butter, ⅔ cup peanut butter, 1 cup hot water
  • Mix the eggs and vanilla into the milk mixture.
    1 teaspoon vanilla extract, 2 large eggs
  • Add hot peanut butter mixture to flour mixture and stir until just barely mixed. Stir in milk mixture and continue to stir until just incorporated.
  • Spread into a greased 13x18x1-inch half sheet pan and bake at 350°F for 25 minutes.
  • Cool completely then frost.


Serving: 1pieceCalories: 231kcalCarbohydrates: 29gProtein: 4gFat: 12gSaturated Fat: 6gPolyunsaturated Fat: 5gCholesterol: 36mgSodium: 179mgFiber: 1gSugar: 17g
Tried this recipe?Mention @carleecooks or tag #cookingwcarlee!

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Recipe Rating


Monday 8th of May 2023

I only have natural peanut butter would that work? This recipe looks so delicious


Monday 8th of May 2023

As long as your peanut butter is well stirred (and has been well stirred throughout the life of the jar) it should work great! If it hasn't been well stirred, the solids to oil ratio may be off a bit.

Big Rigs 'n Lil' Cookies

Wednesday 11th of April 2018

This sounds so good! You can't go wrong with adding peanut butter to a birthday!

Big Rigs 'n Lil' Cookies

Monday 14th of September 2020

Made this yesterday, and I think it just might be my new favorite cake!


Friday 13th of April 2018

I agree, the more peanut butter the better!


Monday 9th of April 2018

In my opinion, one can never have too many peanut butter recipes. This sheet cake looks fantastic.


Friday 13th of April 2018

I agree completely! Thank you!


Saturday 31st of March 2018

I love sheet cakes, and this looks delicious!


Wednesday 4th of April 2018

Thank you so much!


Friday 30th of March 2018

I have NEVER made a peanut butter cake and I wonder why?!? I will have to remedy that! Pinned and share on facecbook!


Wednesday 4th of April 2018

You need to change that asap! Thank you <3