Classic three ingredient peanut butter cookie dough goes giant and gets slathered with Texas Sheet Cake frosting making an epic peanut butter cookie cake recipe we can’t stop eating. Naturally gluten free and a ridiculously quick and easy recipe. What more could we ask for from dessert?
If you’ve ever stood in the bakery section eyeing those giant frosted cookie cakes and thought, I could absolutely eat that entire thing, you’re in the right place. This cookie cake recipe delivers everything you love about a classic cookie cake—soft center, chewy edges, rich chocolate frosting—but with a fraction of the effort and none of the mystery ingredients.
This is a from-scratch cookie cake recipe that’s quick, unfussy, and incredibly reliable. No chilling. No rolling. No mixer required. Just a handful of pantry staples, one bowl, and about 30 minutes start to finish.
It also happens to be naturally gluten free, thanks to its roots in the iconic 3-ingredient peanut butter cookie. That means no specialty flours, no tricky substitutions, and no one will ever guess it’s flourless. It’s just… really good. Perfect for birthdays, celebrations, or anytime you want a nostalgic dessert that feels a little extra without being complicated.
Everything You Need to Know About This Cookie Cake Recipe
What makes this cookie cake recipe special is how intentionally simple it is. The dough is based on the classic 3-ingredient peanut butter cookie—peanut butter, sugar, and egg—with vanilla added for extra flavor and depth. That old-school combination is famous for a reason: it works every single time.
Because there’s no flour, this cookie cake is naturally gluten free without trying to be. There’s nothing “alternative” about it. No gritty texture. No weird aftertaste. Just a soft, chewy cookie that happens to be flourless.
Texture-wise, this cookie cake hits all the right notes:
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Soft and tender in the center
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Slightly chewy around the edges
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Thick enough to feel indulgent without being cakey
And then there’s the frosting. If you have ever had Texas Sheet Cake you know how GOOD that frosting is. I pour it over every dessert I can and let the complements roll in. It is a pourable chocolate frosting that spreads easily and gives you a fancy bakery finish without any fancy bakery fuss!
Add in the fast bake time and minimal cleanup, and this is the kind of recipe you’ll reach for again and again—especially for birthdays and celebrations when you want something festive but low-stress.
What Is a Cookie Cake?
A cookie cake is exactly what it sounds like: a giant cookie baked as a single layer and sliced like a cake. It has the flavor and chew of a cookie but the presentation of a cake, which is why it’s such a popular choice for parties and birthdays.
Compared to regular cookies, cookie cakes:
- Stay softer longer
- Are easier to decorate
- Feel more celebratory
Why You’ll Love This Cookie Cake Recipe
There are a lot of reasons this recipe earns a permanent spot in your dessert rotation:
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One-bowl dough with zero fancy equipment
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No mixer required (a wooden spoon works perfectly)
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Ready in under 30 minutes, including frosting
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Naturally gluten free with no specialty ingredients
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Classic peanut butter + chocolate flavor combo
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Bakes evenly thanks to the thin, wide shape
It’s approachable enough for beginner bakers but still impressive enough to serve at a party. That’s a sweet spot not every recipe hits.
My Favorite Cookie Cake Decorations
Cookie cakes can be as simple or as fancy as you want them to be. If you plan to add decorations, do it right away before the frosting sets. Once it firms up, it holds everything beautifully. This cake is so good by itself nobody will notice if you keep the decorations simple! But if you want to pretty it up these are my favorite options:
- Sprinkles are an easy, no fuss go to. Just put them on right away before the frosting sets or they won’t stick.
- Mini or regular chocolate chips are fun if you want some chocolate with your chocolate
- Peanut Butter Cups sliced in halves or quarters also make a great boarder to this cake!
- M&M’s are a yummy decoration for this cookie cake. Use seasonal holiday colors for your favorite holidays and consider festive shapes like making a heart for Valentine’s day or a flag at 4th of July or even a pretty Egg shape for Easter.
How to Make a Cookie Cake (Step-by-Step)
Baking cookie cakes is straightforward and forgiving, which is exactly what you want in a celebration dessert.
Start by mixing the peanut butter, sugar, egg, and vanilla together in a medium bowl until fully combined. The dough will be thick but smooth and glossy.
Press the dough into a greased 14-inch pizza pan using your fingers. Aim for an even layer that stops about an inch from the edge of the pan—this helps prevent overbrowning and gives you cleaner edges.
Sprinkle a tablespoon of sugar evenly over the top. This small step adds texture and helps create that classic cookie crackle.
Bake just until the cookie is lightly golden and the edges begin to crack. The top should look set, not shiny or wet. Overbaking is the fastest way to dry out a cookie cake, so pull it while it still looks slightly soft in the center.
Let the cookie cool for 10–20 minutes before frosting. This makes the frosting easier to spread and prevents it from pulling the top off the cookie! (Ask me how I know 😂)
To make the frosting, melt the butter in a saucepan, whisk in the milk and cocoa, then remove from heat and whisk in the powdered sugar and vanilla. The frosting should be smooth, glossy, and pourable. (If yours did thicken up a bit add another Tablespoon of milk!)
Pour it into the center of the cookie and spread it outward with a spatula. Work quickly—the frosting sets fast and smooth.
How to Store and Serve Cookie Cake
Cookie cakes are at their absolute best the day they’re made, when the center is soft and the frosting is perfectly set.
That said, this cookie cake recipe holds up well:
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Room temperature for up to 2 days, covered
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Next day texture stays chewy, not dry
Refrigeration isn’t necessary and can actually firm up the cookie more than you want. If you need to transport it, let the frosting fully set first, then cover loosely. I buy plain white pizza boxes and use them to package and gift cookie cakes! Easy to transport every time.
Slice with a sharp knife or pizza cutter and serve just like a cake—no crumbs, no fuss, and no leftovers if you’re feeding a crowd.
Cooking Equipment for Cookie Cake Recipes
- 14″ USA Pizza Pan: This pan is a rock star for perfectly baking a cookie cake. I actually bought two because so often I bake two cookie cakes for an event.
- 14″ Cardboard Pizza Boxes: I take cookie cakes all over for birthdays and gifts. But they are the most fun when take them unsliced. This pizza box has been my solution to packing them up to go. If you want to get extra fancy load up your cookie and slap a bow on top!
- Quality Whisk: So many people don’t have a high quality whisk that can really whisk sauces and batter well. I love this OXO whisk for strength, durability and washability.
Love Great Cookies? Try Some More of My Popular Cookie Cakes and Cookies
- My amazing Chocolate Chip Cookie Cake
- Sugar Cookie Fruit Pizza Cookie Cake
- Easy Caramel Shortbread Turtle Bar Cookies
Peanut Butter Cookie Cake Recipe (Easy, Chewy, and Frosted)
Ingredients
For The Peanut Butter Cookie Cake Dough
- 1 cup peanut butter see Note #1
- 1 cup granulated sugar plus 1 Tablespoon for the top
- 1 egg
- 1 Tablespoon vanilla extract
For the Chocolate Frosting
- ¼ cup salted butter
- 2 ½ Tablespoons milk whole or 2% ideal
- 2 Tablespoons unsweetened baking cocoa
- 1 ¾ cups powdered sugar
- 2 teaspoons pure vanilla extract
Optional Cookie Cake Decorating Ideas:
- Sprinkles
- Mini chocolate chips or regular chocolate chips
- Mini M&Ms or regular size M&Ms
Instructions
To Make the Cookie Cake:
- Preheat the oven to 375 F.
- In a medium mixing bowl, stir the peanut butter, 1 cup of granulated sugar, egg, and 1 Tablespoon of vanilla together with a wooden spoon until completely combined. (You could use a hand mixer or stand mixer instead.)
- Spread the dough into a 14” pizza pan with fingers. The dough should be even, mostly smooth, and stop about 1” from the edge of the pan all the way around. (See notes for other baking pan options.)
- Sprinkle the last 1 Tablespoon of white sugar evenly over the top of the cookie.
- Bake at 375 for 9-10 minutes until the entire cookie is a light tan and the edges are just starting to crack. The top will look baked and not raw.
- Remove the baked cookie to cool to a rack for about 10-20 minutes. Then start making the frosting. (Letting the cookie cool a little bit makes it WAY easier to frost it.)
To Make the Chocolate Frosting:
- In a medium to medium-large sauce pan melt the butter over medium-high heat. Whisk in the milk and baking cocoa. Turn the heat down to medium and continue to simmer for about 30 seconds.
- Remove from heat and whisk in powdered sugar and then vanilla. If you see any small lumps remaining whisk vigorously until the frosting is smooth and creamy.
- Pour the frosting on to the middle of the cookie and use a rubber spatula to spread it out until you reach the sides. The frosting is easy to spread and will look very smooth as it sets as long as you work quickly as you even the chocolate out.
- If you want to decorate with sprinkles or something do it right away before the frosting sets up.
Helpful Recipe Notes
Note #2: If you use a 12” pizza pan it will take around 13 minutes to bake because the cookie is thicker. Please watch your bake carefully and use a timer.
Your Rating Matters
When you leave a comment or star rating, it means more than you might think. It helps me understand what you’re enjoying, builds trust for other readers, and supports real, tested cooking content. If you have a moment, I’d truly appreciate you sharing your experience. - Mirlandra
Nutrition Estimate
A Note on Nutrition
Nutritional info is an imperfect estimate. Please take it with a grain of salt.
When you leave a comment or star rating, it means more than you might think. It helps me understand what you’re enjoying, builds trust for other readers, and supports real, tested cooking content. If you have a moment, I’d truly appreciate you sharing your experience. – Mirlandra
Behind the Scenes: Food Blogging Life
This year I’ve been sharing snippets of what life is like behind the pretty pictures! Lots of dirty dishes and mess goes with all the great food!
This is real food blogging life! A photo shoot for an insanely yummy cookie cake recipe and a pile of clean laundry on the same table with our homeschooling stuff! It gets pretty funny sometimes between kids and cats and food and camera equipment.
My home and kitchen are an experience of ordinary chaos. The threads of food and living and school and work and joy are woven through it all. This is what you would see if you actually knocked on my door when I’m shooting pretty pictures of food!
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