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Funfetti Peanut Butter Cookie Cake

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This funfetti peanut butter cookie cake (with plenty of chocolate) is a delicious and simple way to celebrate any occasion, or just a regular old Thursday.

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overhead shot of a slice of funfetti peanut butter cookie cake on a plate with the rest of the cookie cake in the background

With chocolate chips! And chocolate frosting! And extra sprinkles on top! Because we’re CELEBRATING today! April 1 is my little Cookie’s first birthday. (Technically she’s two-and-a-half-ish but we’re calling the day I signed her adoption papers her bday. So she’s one.)

She’s lasted one whole year as my fur baby without running away! Although she did attempt to make a break for it when I first met her at her adoption day. Her tiny 12-pound self jumped out of the shopping cart in the parking lot at Petco, right in front of all the volunteers from the shelter. I was terrified they’d think I was neglectful and not let me take her home but they were very nice and laughed it off. A year later I’m still watching her like a hawk every second and we’ve not had a similar experience.

Knock on wood.

She’s very wiggly so you never know.

overhead shot of the unbaked funfett peanut butter cookie cake

When I first brought her home, after the initial few days where she refused to eat anything, I started bribing her with all kinds of treats to get her to eat. Pumpkin was the first food she really liked. Much to my dismay, she had no interest in peanut butter. (I KNOW! WHAT?)

Then a few months ago I’d been eating peanut butter out of the jar (what else is new) and dripped some on my jeans. I didn’t even notice it until Cookie started licking my knee and wagging her tail. And ever since then she’s been a peanut butter fanatic.

So naturally her first birthday cake had to incorporate peanut butter. I settled on making a cookie cake with peanut butter and sprinkles. It’s basically my little Cookie but in cake form. She’s fun, she’s sweet, she’s completely adorable—just like this cookie cake.

overhead shot of the funfetti peanut butter cookie cake with piped chocolate frosting

And guys, nothing could be easier. It’s even easier than baking chocolate chip cookies because instead of all the dropping onto baking sheets/removing from baking sheets/repeating til you drop, you just bake the dough all at once. Top with a little chocolate frosting and you’ve got yourself a cookie cake worthy of a celebration.

Clearly, this is not a dog-friendly cake so don’t worry. I didn’t let the birthday girl have any. I’m working on a pupcake for her so she can get in on the celebration.

Yes, I feel a little guilty for celebrating without her. No, I don’t think she cares. I put a little PB in a kong for her while I ate my cookie cake. She wagged her tail so we’re good.

Dog birthdays are the best birthdays of all :).

slice of funfetti peanut butter cookie cake on a plate with the cake and some forks in the background

Print
Funfetti Peanut Butter Cookie Cake
Prep Time
20 mins
Cook Time
15 mins
Total Time
35 mins
 

This cookie cake is easier to make than a batch of drop cookies and it's such a fun treat for a party!

Course: Dessert
Cuisine: American
Servings: 8
Author: Kelsie
Ingredients
Cookie cake:
  • 4 tablespoons unsalted butter at room temperature
  • 1/4 cup granulated sugar
  • 1/4 cup packed light brown sugar
  • 1 egg
  • 1/4 cup + 2 tablespoons creamy peanut butter don’t use natural
  • 1/2 teaspoon vanilla extract
  • 1 cup all-purpose flour
  • 1 teaspoon cornstarch
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup mini chocolate chips
  • 2 tablespoons rainbow jimmies
Chocolate frosting:
  • Chocolate buttercream:
  • 1/2 cup unsalted butter at room temperature
  • 1/2 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 5 tablespoons cocoa powder
  • 1 1/2 cups powdered sugar
  • 1 to 2 tablespoons milk or heavy cream as needed
Instructions
Cookie cake:
  1. Preheat oven to 375 degrees. Spray a 9-inch tart pan with a removable bottom (or a 9-inch cake pan) with cooking spray. Set pan aside.
  2. In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugars together until light and fluffy. Add the egg and beat to combine. Add peanut butter and vanilla, beating until fully incorporated.
  3. Combine the flour, cornstarch, baking soda, and salt in a small mixing bowl. With mixer on low, beat in to butter mixture until just combined. Fold in chocolate chips and jimmies until evenly distributed.
  4. Press dough into the prepared pan and bake for 12 to 15 minutes, until lightly golden. A toothpick inserted into the center of the cookie cake should come out clean. Cool completely in pan on a wire rack. Once completely cooled, carefully turn cookie cake out onto a serving plate.
Chocolate frosting:
  1. Beat butter on medium speed until light and fluffy, about 2 minutes. Add vanilla and salt and beat to combine. Beat in cocoa powder, then turn mixer to low and gradually add powdered sugar. Beat on high speed for 4 minutes. Add milk 1 teaspoon at a time to achieve a pipe-able consistency.
  2. Pipe frosting onto cooled cookie cake and decorated with sprinkles as desired. Serve and enjoy.

Cookie cake adapted from Allrecipes.

Comments

    • Kelsie says

      Thank you so much Milena! This would be perfect with a cup of coffee. I think I’ll have to make another one so that can happen :).

      Reply

    • Kelsie says

      Haha! Thank you, Patrick! Finally coming around to peanut butter is probably the smartest thing she’s ever done :).

      Reply

  5. Sara - beamingbanana.com says

    Doggy birthdays are so fun to celebrate! Mine’s is coming up too, she’ll be 2, I can totally relate to the whole “watching like a hawk,” thing! This cake looks so sweet and fun, perfect for any birthday celebration 🙂

    Reply

    • Kelsie says

      Thank you so much, Kim! It didn’t last long here, either :). I passed on the happy birthday–Cookie wagged her tail so I’m pretty sure she understood. (I’m also pretty sure that at this point, I’m a crazy dog lady!)

      Reply

    • Kelsie says

      You’re welcome any time! I need help with all the baked goods…I’m pretty sure you know how that goes. Thank you so much!

      Reply

  10. karrie @ Tasty Ever After says

    Happy birthday Cookie! Wish I could have had a piece of your cookie cake 😉 This is such a brilliant recipe and way easier than baking a cake. Love that you made it to celebrate Cookie’s bday and then ate it! lol! I’m doing that for my two furbabies’ birthdays. Thanks for the idea 🙂 heeheeheehee

    Reply

    • Kelsie says

      Thank you, Karrie! I love that our fur babies give us (even more) reasons to bake :). I’ll save you a piece next time!

      Reply

  11. Megan says

    OMGGG this looks so.dang.delicious!! My mouth is watering and it’s almost 10p.m. LOL I need to go to bed but I can’t stop staring. Yummy! Thanks for sharing your recipe, I may need to try it.

    Reply

  13. Ruby_&_Cake says

    Ahhh this is the most gorgeous story! I am sure you could just put more peanut butter on your knees while you get to munch on this glorious creation! This will be such a great treat to make for easter 😀

    Reply

    • Kelsie says

      Oh, thank you so much! I’ll have to keep that idea in mind :). Cookie wouldn’t care what I was doing if she was getting to lick pb off my knees!

      Reply

  14. lynne hoareau says

    Kelsie, I am literally drooling over this peanut butter cookie cake !!! OMW !!! it sounds divine ! Congratulations to you on having little Cookie for a year, she is adorable 🙂 and a big Happy Birthday to little Cookie on the 1st April 🙂 I hope you will have a nice little pupcake ready for her 🙂 …no pressure 🙂
    Anyway this cookie cake, I am making for sure. It is something I have always wanted to do…I mean it is a giant size cookie 🙂
    Have a great day and big hugs to Cookie.

    Reply

    • Kelsie says

      Thank you so much, Lynne! Cookie is such a little doll :). I’ll definitely have something special for her on April 1! Giant sized cookies are the best!

      Reply

    • Kelsie says

      Thank you so much! Next time you make cookies FOR SURE add some frosting. The frosting takes delicious, delicious cookies to a whole new level 🙂

      Reply

    • Kelsie says

      Thank you, Laura! I can’t believe I neglected to include a pic of my puppy. . .I will include one in an upcoming post to make up for it 🙂

      Reply

  21. Eva Taylor says

    Thank you for leaving a comment on my blog. For some reason, your blog is not linked like everyone else’s, you must not have entered your url.
    Happy Birthday to your lovely puppy. The cake looks like a wonderful way to celebrate! You should check out the easiest gluten free peanut butter cookie recipe on my blog, it’s all about the peanut butter, I think you’ll like it.

    Reply

    • Kelsie says

      Hmmm I must have forgotten. Thank you for the birthday wishes! I’ll definitely check out the cookie recipe. I love any peanut butter cookie!

      Reply

  23. Allie R Taylor says

    Kelsie – you’re so funny. First I thought cookie was a child. Then no. Then I thought you GAVE her some cake. And then you didn’t. You sure are full of surprises. And I can see why you didn’t want to share. I wouldn’t either. Happy, happy birthday to your sweet fur baby. I love the cake, it’s awesome. Because peanut butter and chocolate. That’s why. XO

    Reply

    • Kelsie says

      Haha! She kind of is my child–I definitely talk about her like she is :). Thank you so much for the birthday wishes and all of your kind words! PB and chocolate FOREVER! Thank you, Allie!

      Reply

    • Kelsie says

      Thank you, Tandy! Cookie is what I call “mystery terrier” :). I have absolutely no idea what else is mixed in there! Her vet thinks maybe some shih tau. . .but I don’t know. Aren’t rescue dogs the best? I had no idea dogs could be allergic to pb; I guess it makes sense since people can be!

      Reply

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