Funfetti Sugar Cookie Bars are a quick and easy dessert bar recipe that uses a box cake mix for the best flavor. Soft, chewy, and covered with the best buttercream sugar cookie frosting, you’re going to love this easy dessert!

a plate with 2 sugar cookie bars with pink frosting and sprinkles

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funfetti bars with cake mix on a white plate stacked

These Funfetti bars with cake mix are the perfect easy bar cookie dessert! All you need are 5 simple ingredients to get started. They may be even easier than my favorite Homemade Frosted Sugar Cookies recipe!

This quick and easy dessert recipe will have everyone rushing to the kitchen to grab a square! I love how moist and dense they are and they allow me to bake without any real stress or worry at all. They always turn out!

And since you only need a handful of ingredients from your pantry to make this simple cake mix dessert, it’s one that you can easily bake up the moment a craving strikes.

Our family has tested out these cake mix cookie bars MANY times and I can promise you it’s delicious and simple to do. Make sure to check out our Sugar Cookie Bars with my favorite frosting, too! They are delish!

Ingredients For Funfetti Cake Bars

See recipe card below for ingredient quantities and full instructions.

  • 15.25oz box Funfetti cake mix – Pillsbury, Betty Crocker, and Duncan Hines make delicious cake mix options.
  • 17.5oz Sugar cookie mix – I normally grab the bag mix from Betty Crocker for only $1!
  • 1 cup Butter –  Make sure to use unsalted butter
  • 2 Eggs – Room-temperature eggs always seem to do better with baking.
  • 1 tsp Vanilla – A good vanilla extract is key to good flavor!

You’ll also need your favorite frosting (or you can try this homemade frosting recipe) and sprinkles for the top, too!

  1. Preheat the oven: Heat the oven to 350 degrees. Grease a 13X9-inch pan with nonstick cooking spray.
  2. Cream: In a large bowl, mix the cookie mix, Funfetti cake mix, butter, eggs, and 1 teaspoon of vanilla using a mixer. Mix on low speed for about 30 seconds of time. Then, increase to medium speed and beat for about 1 minute. Pour into your pan. This mixture will be VERY thick. You may need to use clean hands to press it down.
  3. Bake: Put in the oven and bake for about 30 minutes or until golden brown. Once done, let the cookie bars cool for about 1 1/2 hours. Since the batter is so dense and thick, it may sink a little in the middle. Just frost right over it!
  4. Frost: Frost with my Sugar Cookie Frosting or your favorite store-bought frosting and top with sprinkles. Don’t forget to add a few drops of your favorite food coloring to the frosting for a fun addition!
cake mix cookie bars in a white dish

Quick Tip

Try baking the batter in a greased muffin tin. This will give you perfectly round, thick cookie bars. The edges will be a little crispier but the center will still be nice and chewy.

How to Store Funfetti Bars

Storing these dessert bars is easy! Just add a lid or plastic wrap to the baking dish and keep it in the fridge. They should be fine for the next couple of days without issue (although I highly doubt that they’re going to last that long!).

FAQs

How do you know when cookie bars are done baking?

Your nose will start to smell them, but you can also do the toothpick test to see. Put a clean toothpick into the bars and pull it out. If the toothpick is clean, they’re ready to be pulled from the oven.

Why is my frosting melting off the cookie bars?

More than likely, you didn’t let the cookie dessert cool down completely. If the dessert is still hot or warm, the icing will end up melting right off the top.

Will sprinkles melt in cake batter?

Sprinkles do melt when baked inside a cake. They leave behind small, colorful specks of sweetness within the batter. However, since they are melted, the crunch of the sprinkles is gone. That is why I like adding sprinkles on top of cakes, cupcakes, and bars in addition to baking them inside the dessert.

funfetti sugar cookie bars with a bite taken out of one

More Tasty Cake Mix Recipes

Funfetti Sugar Cookie Bars

Funfetti Sugar Cookie Bars are a quick and easy dessert bar recipe that uses a box cake mix and sugar cookie mix for the best flavor and ease!
4.34 from 12 votes
Course: Dessert
Cuisine: American
Author: Kasey Schwartz
Prep Time: 10 minutes
Cook Time: 30 minutes

Ingredients  

  • 1 pouch
  • 1 15.25oz box Funfetti white cake mix
  • 1 cup butter melted and slightly cooled
  • 3 eggs
  • 1 teaspoon vanilla

Instructions 

  • Heat the oven to 350 degrees. Be certain to grease a 13X9-inch pan with nonstick cooking spray.
  • In a large bowl, mix the cookie mix, Funfetti cake mix, butter, eggs, and 1 teaspoon of the vanilla using a mixer. Mix on low speed for about 30 seconds of time. Then change to medium speed and beat for about 1 minute. Pour into your pan.  
    1 15.25oz box Funfetti white cake mix, 1 cup butter, 3 eggs, 1 teaspoon vanilla
  • Put in the oven and bake for about 30 minutes or until golden brown. Once done, let the cookie bars cool for about 1 1/2 hours.
  • Frost with my Sugar Cookie Frosting or your favorite store-bought frosting and top with sprinkles. Don't forget to add in a few drops of pink food coloring to the frosting! 

Notes

How to store: Storing these dessert bars is easy! Just add a lid or plastic wrap to the baking dish and keep it in the fridge. They should be fine for the next couple of days without issue

Nutrition

Calories: 3610kcal | Carbohydrates: 374g | Protein: 35g | Fat: 221g | Saturated Fat: 121g | Polyunsaturated Fat: 9g | Monounsaturated Fat: 53g | Trans Fat: 7g | Cholesterol: 979mg | Sodium: 2943mg | Potassium: 243mg | Sugar: 212g | Vitamin A: 6386IU | Calcium: 129mg | Iron: 4mg
Did you make this recipe?Mention @kasey_allthingsmamma or tag #allthingsmamma!

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About Kasey Schwartz

For over 15 years, Kasey Schwartz, the mastermind behind All Things Mamma, has been the ultimate go-to for mouthwatering family recipes. Her work has been featured on Today.com, Buzz Feed, Better Homes and Gardens, and more, making her your go-to mom next door for all things delicious and family-friendly.

Comments

  1. 5 stars
    I make this all the time! Thank you!

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