Peanut Butter Texas Sheet Cake

Craving a decadent dessert that’s easy to make? Look no further than this Peanut Butter Texas Sheet Cake. This classic recipe gets a peanut butter twist, delivering a rich, indulgent treat perfect for any occasion.
Combining a moist peanut butter cake with a creamy peanut butter frosting, this sheet cake is a dream come true for peanut butter lovers. The best part? It’s incredibly simple to whip up, making it ideal for busy weeknights or spontaneous gatherings.
Serve it warm with a scoop of vanilla ice cream for a decadent treat, or cut into squares for a portable snack. You can also get creative with toppings like chopped peanuts, chocolate chips, or a drizzle of caramel sauce. No matter how you serve it, this sheet cake is sure to be a hit with everyone.
Whether you’re hosting a backyard barbecue or simply satisfying a sweet tooth, this Peanut Butter Texas Sheet Cake is sure to impress. So, gather your ingredients and get ready to indulge in this irresistible dessert.
Questions I often get asked about this recipe:

How long can I store leftover Peanut Butter Texas Sheet Cake?
Properly stored, the Peanut Butter Texas Sheet Cake can last for up to 3 days at room temperature. Cover it loosely with plastic wrap to prevent it from drying out.
Can I freeze this cake?
Yes, you can freeze this cake. Wrap it tightly in plastic wrap and then aluminum foil. It can be frozen for up to 3 months. Thaw overnight in the refrigerator before serving.
What other frosting options can I use?
While the classic peanut butter frosting is delicious, you can experiment with other options. A chocolate ganache or cream cheese frosting would also complement the cake well.
Can I substitute the buttermilk in the recipe?
While buttermilk adds a tangy flavor and helps with the cake’s texture, you can substitute it with an equal amount of regular milk mixed with one tablespoon of white vinegar. Let it sit for a few minutes before using.
What you need to make Peanut Butter Texas Sheet Cake:

For the cake:
2 cups all-purpose flour
2 cups white sugar
1 teaspoon baking soda
1 cup water
¾ cup butter or margarine, softened
½ cup peanut butter
¼ cup vegetable oil
2 eggs
½ cup buttermilk
1 teaspoon vanilla extract
For the frosting:
⅔ cup white sugar
⅓ cup evaporated milk
1 tablespoon butter or margarine
⅓ cup chunky peanut butter
½ teaspoon vanilla extract
How to make it:

Preheat oven to 350°F (175°C). Grease a 10x15x1 inch jellyroll pan.
Combine dry ingredients: In a large bowl, whisk together flour, 2 cups sugar, baking soda, and salt. Set aside.
Combine wet ingredients: In a medium saucepan, combine water and ¾ cup butter. Bring to a boil. Remove from heat and stir in peanut butter and vegetable oil until well blended.
Combine mixtures: Pour the hot peanut butter mixture into the dry ingredients and stir until combined.
Add remaining ingredients: In a separate bowl, whisk together eggs, buttermilk, and vanilla. Stir into the peanut butter mixture until well blended.
Bake: Pour batter into prepared pan. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean. Let cool completely.
Make frosting: While cake is cooling, combine frosting ingredients in a saucepan. Bring to a boil, stirring constantly. Reduce heat and simmer for 1 minute.
Frost cake: Pour frosting evenly over cooled cake. Let set for at least 30 minutes before cutting.
Tips:

For a richer flavor, use dark brown sugar instead of white sugar in the cake batter.
You can substitute creamy peanut butter for chunky in the frosting if you prefer.
For a gooier frosting, add a bit more evaporated milk.
Latest Reviews:

This Peanut Butter Texas Sheet Cake is pure indulgence! The cake is moist and flavorful, and the frosting is creamy perfection. It’s incredibly easy to make and always a crowd-pleaser. Highly recommend! Michelle K.
I’ve made this sheet cake countless times and it never disappoints. The combination of peanut butter and chocolate is unbeatable. Perfect for potlucks or a casual weeknight dessert. Helen K.
This recipe is a keeper! The frosting is the star of the show – rich, creamy, and full of peanut butter flavor. The cake is the perfect complement. My family devoured this entire pan in one sitting! Jesse T.
Printable Recipe:


Peanut Butter Texas Sheet Cake
Peanut Butter Texas Sheet Cake
Ingredients
- For the cake:
- 2 cups all-purpose flour
- 2 cups white sugar
- 1 teaspoon baking soda
- 1 cup water
- ¾ cup butter or margarine, softened
- ½ cup peanut butter
- ¼ cup vegetable oil
- 2 eggs
- ½ cup buttermilk
- 1 teaspoon vanilla extract
- For the frosting:
- ⅔ cup white sugar
- ⅓ cup evaporated milk
- 1 tablespoon butter or margarine
- ⅓ cup chunky peanut butter
- ⅓ cup miniature marshmallows
- ½ teaspoon vanilla extract
Instructions
- Preheat oven to 350°F (175°C). Grease a 10x15x1 inch jellyroll pan.
- Combine dry ingredients: In a large bowl, whisk together flour, 2 cups sugar, baking soda, and salt. Set aside.
- Combine wet ingredients: In a medium saucepan, combine water and ¾ cup butter. Bring to a boil. Remove from heat and stir in peanut butter and vegetable oil until well blended.
- Combine mixtures: Pour the hot peanut butter mixture into the dry ingredients and stir until combined.
- Add remaining ingredients: In a separate bowl, whisk together eggs, buttermilk, and vanilla. Stir into the peanut butter mixture until well blended.
- Bake: Pour batter into prepared pan. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean. Let cool completely.
- Make frosting: While cake is cooling, combine frosting ingredients in a saucepan. Bring to a boil, stirring constantly. Reduce heat and simmer for 1 minute.
- Frost cake: Pour frosting evenly over cooled cake. Let set for at least 30 minutes before cutting.
If you enjoyed this recipe, please share it on your social media! I would love for more people to try this delicious and easy-to-make recipe. If you have any questions or feedback, please feel free to leave a comment below. I would love to hear from you! Shhh… Join our secret foodie group on Facebook
German Chocolate Brownies
Brownie Crust Chocolate Cheesecake
Hershey’s Chocolate Cake
