Easy & Irresistible Peanut Butter Texas Sheet Cake Recipe

Oh, sheet cake! Just saying those words brings me back to potlucks, picnics, and family gatherings. There’s something so wonderfully nostalgic and comforting about a big, flat cake baked in a sheet pan. And while chocolate Texas Sheet Cake is a classic for a reason, today we’re taking things to a whole new level of deliciousness with a peanut butter twist! This Peanut Butter Texas Sheet Cake is incredibly easy to make, whips up faster than you might think, and disappears even quicker from the pan. Get ready for moist cake and dreamy peanut butter icing – it’s pure bliss!

Why You’ll Love This Recipe

• Fast: From start to finish, you’ll have a delicious cake ready in under an hour!
• Easy: Simple ingredients and straightforward steps make this a perfect recipe for bakers of all levels.
• Giftable: Bake a batch and share the joy (if you can resist eating it all yourself!).
• Crowd-pleasing: Who doesn’t love peanut butter and cake? This is guaranteed to be a hit!

Ingredients

Here’s what you’ll need to whip up this amazing cake. Most of these are likely already hanging out in your pantry!

For the Cake:

• 2 cups all-purpose flour: The backbone of our moist cake.
• 2 cups granulated sugar: For sweetness and tenderness.
• 1/2 teaspoon baking soda: Our leavening friend, helps the cake rise beautifully.
• 1 teaspoon salt: Balances the sweetness and brings out all the flavors.
• 1 cup (2 sticks) unsalted butter: Melted goodness that makes the cake rich and moist. Using unsalted lets you control the salt level.
• 1 cup water: Hydrates the batter and helps create that signature texture.
• 1/4 cup creamy peanut butter: Our star ingredient! Use a good quality creamy one for the best result.
• 2 large eggs, beaten: Binds everything together and adds richness.
• 1 teaspoon vanilla extract: Enhances all the sweet flavors.
• 1/2 cup buttermilk: Adds tenderness and a slight tang that pairs wonderfully with peanut butter.

For the Peanut Butter Icing:

• 1/2 cup (1 stick) unsalted butter: The base for our creamy icing.
• 1/4 cup creamy peanut butter: More peanut butter power!
• 1/3 cup + 1 tablespoon milk: Helps create the perfect pourable consistency.
• 1 (16-ounce) package powdered sugar: The essential ingredient for that smooth, sweet icing.
• 1 teaspoon vanilla extract: A little extra flavor boost for the icing.

How to Make It

Okay, let’s get baking! It’s super easy, I promise.

1. First things first, preheat your oven to 350°F (175°C). Then, get your pan ready. You’ll need a 15×10 inch jelly-roll pan. Give it a good grease and flouring so your beautiful cake doesn’t stick.
2. In a large bowl, grab your whisk and combine the flour, sugar, baking soda, and salt. Give it a good whisk to make sure everything is evenly distributed. Set that bowl aside for a moment.
3. Now, for the wet ingredients. In a medium saucepan, combine the butter, water, and that glorious creamy peanut butter. Put it over medium heat and bring it to a boil, stirring constantly. You want the butter melted and the mixture nice and smooth.
4. Once your butter mixture is boiling and smooth, carefully pour it into the bowl with your dry ingredients. Mix it up until it’s just combined. Don’t overmix here; we want a tender cake!
5. In a small separate bowl, whisk together your beaten eggs, vanilla extract, and buttermilk.
6. Pour this egg mixture into the batter in the large bowl. Again, mix gently until everything is just combined. You should have a lovely smooth batter now.
7. Pour the batter into your prepared jelly-roll pan and spread it out evenly.
8. Pop it into the preheated oven and bake for 25-28 minutes. You’ll know it’s ready when a toothpick inserted into the center comes out clean.
9. While the cake is baking, or right after it comes out, you can start on the icing. You want to pour the icing over a warm cake, so timing is key!
10. For the icing, grab a small saucepan and combine the butter, peanut butter, and milk over medium heat. Bring it to a boil, stirring constantly until everything is melted and smooth, just like you did for the cake batter.
11. Remove the saucepan from the heat. Now, gradually whisk in the powdered sugar. Start with a little, whisk until smooth, then add more. Keep going until you have a smooth and creamy icing. Stir in the vanilla extract.
12. As soon as the icing is ready, pour it evenly over the warm cake. It will spread beautifully and soak in just slightly. Let it cool for a bit before slicing and serving. Enjoy every single bite!

Substitutions & Additions

Want to shake things up or need to make a swap? Here are a few ideas:

• Peanut Butter: While creamy is recommended for the smoothest texture, you could use natural creamy peanut butter, though it might make the icing slightly less firm. Using crunchy peanut butter will add little bits of peanuts to both the cake and icing, which is a fun texture!
• Milk: If you don’t have buttermilk, you can make a quick substitute by putting 1/2 tablespoon of white vinegar or lemon juice into a measuring cup, then adding enough regular milk (any kind!) to equal 1/2 cup. Let it sit for 5-10 minutes before using. For the icing milk, 2% or whole milk works great. You could likely use non-dairy milk too, like almond or oat milk.
• Add Chocolate: Peanut butter and chocolate are best friends! Stir a cup of chocolate chips into the cake batter before baking, or sprinkle them over the warm icing so they melt slightly. You could even drizzle melted chocolate over the finished, cooled cake.
• Add Nuts: Sprinkle chopped peanuts or pecans over the warm icing for extra crunch.
• Butter: You can use salted butter, just reduce the salt in the cake batter by 1/4 teaspoon.

Tips for Success

Making sheet cake is pretty foolproof, but here are a few simple tips to make sure yours turns out absolutely perfect every time:

• Measure Accurately: Especially the flour and powdered sugar. Spoon flour into your measuring cup and level it off with a straight edge rather than scooping directly from the bag, which can pack it down.
• Don’t Overmix: Once you add the wet ingredients to the dry (in both the cake and the icing), mix just until they are combined. Overmixing can lead to a tough cake.
• Watch the Baking Time: Ovens vary! Start checking the cake around 25 minutes. You want the toothpick to come out clean, not with wet batter attached. A few moist crumbs are okay.
• Icing Consistency: If your icing seems a little too thick, you can add a tiny splash more milk (1 teaspoon at a time) and whisk until it reaches the desired pourable consistency. If it seems too thin, you can whisk in a little more powdered sugar.
• Warm Cake for Icing: Pouring the warm icing over the warm cake is key. It helps the icing spread smoothly and sets up perfectly. If the cake is cool, the icing might be too thick to spread easily. If it’s too hot, the icing might melt too much.
• Prep Ahead: You can measure out your dry ingredients for the cake and set them aside before you start melting the butter mixture. This helps the process go even smoother!

How to Store It

This cake stays wonderfully moist! Once cooled, you can store leftovers right in the pan, covered tightly with plastic wrap or foil. Alternatively, you can cut it into squares and transfer them to an airtight container.

• At room temperature, the cake will stay fresh for 2-3 days.
• In the refrigerator, it will last for 4-5 days.

It’s so good, though, I doubt it will stick around that long!

FAQs

Got questions? Here are a few common ones:

Can I use a different pan size?

This recipe is designed for a 15×10 inch jelly-roll pan. If you use a smaller pan (like a 9×13 inch), the cake will be thicker and the baking time will be longer (likely 30-40 minutes or more). Keep a close eye on it and test with a toothpick.

Can I freeze this cake?

Yes! Sheet cakes freeze quite well. Let the cake cool completely, then slice it into portions. Wrap individual portions or the whole cake tightly in plastic wrap, then again in foil. It can be frozen for up to 2-3 months. Thaw at room temperature before serving.

Why is my icing lumpy?

Lumpy icing usually happens if the powdered sugar isn’t whisked in gradually or thoroughly enough. Make sure you whisk well after each addition of powdered sugar until smooth before adding more. Ensure your butter and peanut butter mixture was completely smooth before adding the sugar.

Can I make the cake ahead of time?

You can bake the cake ahead of time and let it cool completely. Cover it well and store at room temperature for up to a day. Make the icing fresh right before you plan to serve and pour it over the cooled (or slightly warmed in a low oven for a few minutes) cake.

Easy & Irresistible Peanut Butter Texas Sheet Cake

Oh, sheet cake! Just saying those words brings me back to potlucks, picnics, and family gatherings. There's something so wonderfully nostalgic and comforting about a big, flat cake baked in a sheet pan. And while chocolate Texas Sheet Cake is a classic for a reason, today we're taking things to a whole new level of deliciousness with a peanut butter twist! This Peanut Butter Texas Sheet Cake is incredibly easy to make, whips up faster than you might think, and disappears even quicker from the pan. Get ready for moist cake and dreamy peanut butter icing – it's pure bliss!

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 25 minutes mins

Total Time 40 minutes mins

Course: Baking, Cake, Dessert

Cuisine: American

Ingredients Equipment Method Notes

Ingredients

  

For the Cake

• 2 cups all-purpose flour
• 2 cups granulated sugar
• 0.5 tsp baking soda
• 1 tsp salt
• 1 cup unsalted butter (2 sticks), melted
• 1 cup water
• 0.25 cup creamy peanut butter Use a good quality creamy one
• 2 large eggs beaten
• 1 tsp vanilla extract
• 0.5 cup buttermilk

For the Peanut Butter Icing

• 0.5 cup unsalted butter (1 stick)
• 0.25 cup creamy peanut butter
• 0.33 cup milk + 1 tablespoon
• 1 package powdered sugar (16-ounce package)
• 1 tsp vanilla extract

Equipment

• Jelly-roll pan (15x10 inch)
• Large bowl
• Saucepan (medium or small)
• Whisk

Method

 

1. Step 1: Preheat your oven to 350°F (175°C). Grease and flour a 15x10 inch jelly-roll pan.
2. Step 2: In a large bowl, whisk together the flour, sugar, baking soda, and salt. Set aside.
3. Step 3: In a medium saucepan, combine the butter, water, and creamy peanut butter. Bring to a boil over medium heat, stirring constantly until melted and smooth.
4. Step 4: Carefully pour the hot butter mixture into the bowl with the dry ingredients. Mix until just combined.
5. Step 5: In a small separate bowl, whisk together the beaten eggs, vanilla extract, and buttermilk.
6. Step 6: Pour the egg mixture into the batter in the large bowl. Mix gently until just combined.
7. Step 7: Pour the batter into your prepared jelly-roll pan and spread it out evenly.
8. Step 8: Bake in the preheated oven for 25-28 minutes, or until a toothpick inserted into the center comes out clean.
9. Step 9: While the cake is baking, or right after it comes out, start on the icing. You want to pour the icing over a warm cake, so timing is key!
10. Step 10: For the icing, grab a small saucepan and combine the butter, peanut butter, and milk over medium heat. Bring it to a boil, stirring constantly until everything is melted and smooth.
11. Step 11: Remove the saucepan from the heat. Gradually whisk in the powdered sugar until smooth and creamy. Stir in the vanilla extract.
12. Step 12: As soon as the icing is ready, pour it evenly over the warm cake. Let it cool for a bit before slicing and serving. Enjoy every single bite!

Notes

Substitutions & Additions: You can use natural creamy or crunchy peanut butter (texture will vary). If you don't have buttermilk, make a substitute by adding 1/2 tbsp white vinegar or lemon juice to a measuring cup and filling with milk to 1/2 cup; let sit 5-10 mins. Use any milk for the icing. Add chocolate chips to batter or over warm icing, or drizzle melted chocolate over cooled cake. Sprinkle chopped peanuts or pecans over warm icing. If using salted butter, reduce cake salt by 1/4 tsp.

Tips for Success: Measure accurately, especially flour (spoon into cup, level off). Don't overmix batter or icing. Watch baking time; toothpick should come out clean (moist crumbs are okay). Adjust icing consistency with tiny splashes of milk or more powdered sugar. Pour warm icing over warm cake for best spread and set. Measure dry ingredients ahead of time for smoother process.

Storage: Store cooled leftovers in the pan covered tightly with plastic wrap or foil, or cut into squares and store in an airtight container. Stays fresh 2-3 days at room temperature, 4-5 days in the refrigerator.

Freezing: Cake freezes well. Cool completely, slice, wrap tightly in plastic wrap then foil. Freeze for up to 2-3 months. Thaw at room temperature.

Lumpy Icing: Usually from not whisking powdered sugar in gradually or thoroughly enough. Ensure butter/peanut butter mixture is smooth before adding sugar.

Making Ahead: Bake cake ahead and cool completely. Cover and store at room temp up to a day. Make icing fresh before serving and pour over cooled (or slightly warmed) cake.