This easy peanut butter Texas cake is perfect for feeding a crowd. It is made in a half sheet pan, so you can cut plenty of pieces and the batter comes together in a saucepan.

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.
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As you can tell from the pictures, this cake is also great with peanut butter icing. That makes it more like a classic Texas sheet cake.
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.
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. So, what are you waiting for?


Peanut Butter Texas Sheet Cake
Ingredients
Cake
- 2½ cups all purpose flour
- 2 cups granulated sugar
- ¼ teaspoon salt
- 1 teaspoon baking soda
- ½ cup milk
- 1 teaspoon vinegar
- 1 cup butter
- ⅔ cup peanut butter
- 1 cup hot water
- 2 large eggs
- 1 teaspoon vanilla extract
Peanut Butter Icing
- ¾ cup butter
- 6 Tablespoons milk
- ½ cup creamy peanut butter
- 3½ cups powdered sugar
- 2 teaspoons vanilla extract
Instructions
Cake
- Preheat oven to 350°F
- In a large bowl, mix together 2½ cups all purpose flour, 2 cups granulated sugar, ¼ teaspoon salt, and 1 teaspoon baking soda.
- In a small bowl, mix together ½ cup milk and 1 teaspoon vinegar.
- In a saucepan, melt 1 cup butter over low heat. Stir in ⅔ cup peanut butter until smooth and melted. Mix in 1 cup hot water, bring to a bubble and remove from heat.
- Stir the 2 large eggs and 1 teaspoon vanilla extract into the milk mixture.
- 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.
Icing
- Add ¾ cup butter, 6 Tablespoons milk, and ½ cup creamy peanut butter to a medium saucepan. Bring to a boil, while stirring.
- Remove from heat and whisk in 3½ cups powdered sugar and 2 teaspoons vanilla extract.
- Pour warm frosting over warm cake, using a spatula to spread it evenly. It should be thin enough to spread easily while it is warm. The frosting will set as it cools.
Notes
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Ooh what a delightful recipe for PB lovers! Looks so good…I have to make this 😀
I hope you do!
My grandson only eats peanut butter! I think he will love this cake. I will definitely make this for him when we visit in a few weeks.
It sounds like he and I would be fast friends! This cake sounds perfect for him.