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These Funfetti Gooey Bars are the best cookie bars ever! They start with a cake mix and have just a few ingredients so they’re SO easy to make.

This is the first recipe on this site to ever go viral and it’s no surprise why: they’re easy, so delicious, and FULL of sprinkles!

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close up of funfetti gooey bars

I don’t make the same thing twice very often. Almost never, in fact. I mean, when you’re surrounded by sugar all day every day, most of it new recipes that you can post, the last thing you need (or want) is to make the same batch of cookies you made last week.

Some recipes I do make multiple times: chocolate chip cookies and sugar cookies, plus monkey bread (of course). And I have one more recipe to add to this list: Funfetti Gooey Bars.

I’ve made these SO MANY TIMES because they are THAT good. Also, because I love sprinkles.

This is an old recipe (from 2013) but I’m updating the photos and adding some tips and tricks to the post. Plus, there is a good chance you’ve never seen this recipe because it’s SO old!

stack of gooey bars

The first time I made these, I never even photographed them. They came out of the oven and we were super busy that afternoon, and by the next day the pan looked like a fork had attacked it.

(Because it had, lol.)

What are Gooey Bars?

I consider a gooey bar to be any sort of cookie bar that’s gooey in the center. Gooey bars can be homemade from scratch, or they can be semi-homemade with a mix.

I have made gooey bars like this in SO MANY VERSIONS that it’s impossible to list them all here. That’s why I have a gooey bar recipe page to house them all.

When you start a recipe with cake mix you can instantly make so many different flavors and versions of the recipe, because there are lots of different cake mix flavors.

This Funfetti Gooey Bar version is my favorite one because it uses a yellow cake mix and lots of sprinkles.

To make cookie bars with a cake mix, you just need three ingredients:

  • Cake Mix (any flavor using a box that’s approximately 15 ounces)
  • 1 large egg
  • 1/2 cup unsalted butter that’s softened
How to make gooey cake bars

Mixing Tips

You can make this in a large bowl with a hand mixer or you can use a stand mixer. I prefer using a stand mixer because it goes faster.

It will take awhile for the egg and butter to mix in with the cake mix. It will eventually become thick like a cookie dough – just keep mixing!

How to make gooey cake bars batter in bowl photos

It will get crumbly and seem like it’s never going to come together, especially if you’re using a hand mixer. But it will – just keep mixing.

Then, because these are FUNFETTI gooey bars, I’m adding sprinkles.

How to make funfetti gooey bars

Best Sprinkles for Funfetti Bars

Not all sprinkles are created equal, in case you didn’t know. I consider myself somewhat of a sprinkle expert, and I’ve used lots of different brands and types, so I know what works best in different situations.

For adding into dough, like these gooey bars, I recommend using jimmies sprinkles.

“Jimmies” are the classic rainbow sprinkle you see in the photo above. You can buy them in any color on amazon or at the craft store, or you can buy them in a rainbow mix.

Jimmies are the best sprinkles to use in baking.


I also recommend using a higher quality brand of sprinkles, like Cake Mate or Wilton from local grocery/crafty stores, or CK Products or Hoosier Hill Farm if you’re buying on Amazon.

The cheaper the sprinkle, the more likely they will melt into your dough. You don’t have to buy Sweetapolita or Fancy Sprinkles for baking (that would be too expensive) but just don’t buy Dollar Store sprinkles for baking.

I also don’t recommend adding nonpareils to batters and doughs – they dissolve a lot of the time.

How to make funfetti gooey bars

Putting the Gooey in Gooey Bar

Now that you know how to turn cake mix into a cookie bar, it’s important to learn how to put the gooey in a gooey bar.

For my gooey bar recipes the gooey is sweetened condensed milk.

I layer about 1/2 to 2/3 of dough in the bottom of an 8-inch or 9-inch square pan. Drizzle sweetened condensed milk on top, then add white chocolate chips.

Be sure to leave a border around the edge of the pan that doesn’t have the SCM so that it doesn’t bubble up during baking.

Then, drop the rest of the dough back on the top of the bars. I like to try and seal it around the edges as much as possible to seal in the SCM. It won’t form a solid topping but it will bake together and be gooey and wonderful.

Once they’re baked, you must let them cool to at least warm before slicing or the gooey will ooze out.

funfetti gooey bars with a bite missing


Now, you can go check out all my gooey bar recipes, but here are some easy variations you can make with this recipe or changing them up:

  • Use a different cake mix flavor: chocolate, red velvet, lemon
  • Use chocolate chips or any other flavor chip, or omit
  • Skip the sprinkles and add nuts or add chocolate chips to the batter

Doubling the recipe

You can easily double this recipe and use two cake mixes and the entire can of sweetened condensed milk. If you double the recipe you’ll bake it in a 9×13-inch baking pan and it’ll be thicker than shown. The baking time will be a bit longer as well (by about 5-10 minutes).

Store these bars in an airtight container or you can freeze them. Learn how to freeze desserts like I do!

Some of my other most popular viral recipes:

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close up of funfetti gooey bars

Funfetti Gooey Bars Recipe

4.97 from 30 votes
These Funfetti Gooey Bars are the best cake mix cookie bars ever! Made with a cake mix and a few simple ingredients, they are gooey to the max!
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Yield 12 bars
Serving Size 1 bar


  • 1 box (approx 15 ounces) yellow cake mix
  • 1/2 cup unsalted butter, softened
  • 1 large egg
  • 2/3 cup sprinkles
  • 1/2 cup sweetened condensed milk (from a 14 ounce can)
  • 1 cup white chocolate chips


  • Preheat oven to 350°F. Line a 9×9” pan with foil and spray liberally with cooking spray.
  • Add cake mix, butter, and egg to the bowl of an electric mixer fitted with a paddle attachment. (You can also use a hand mixer.) Mix until a thick dough forms. This will take a long time, especially if you're using a hand mixer. Just keep mixing! Add sprinkles and stir until incorporated.
  • Press about 1/2-2/3 of the dough into the bottom of the prepared pan.Pour sweetened condensed milk over the top of the dough, leaving a thin border around the edges. Sprinkle with white chocolate chips. Separate remaining dough into small balls and evenly space over the top of the bars. Press down to flatten. Try to seal the edges as much as possible.
  • Bake bars for about 25-30 minutes, or until they just begin to brown. Cool completely before slicing, otherwise the mixture will be too gooey to cut.

Recipe Nutrition

Serving: 1bar | Calories: 233kcal | Carbohydrates: 24g | Protein: 2g | Fat: 14g | Saturated Fat: 9g | Cholesterol: 43mg | Sodium: 37mg | Potassium: 96mg | Fiber: 1g | Sugar: 24g | Vitamin A: 297IU | Vitamin C: 1mg | Calcium: 71mg | Iron: 1mg
Nutritional information not guaranteed to be accurate
Course Dessert
Cuisine American

Click here to see my best Cake Mix recipes!

Check out all my funfetti recipes!

gooey cake bars stack with sprinkles

Funfetti Gooey Bars are an easy gooey bar made with cake mix and sprinkles! Make cake mix into a cookie bar with sprinkles and fill it with sweetened condensed milk!SaveSave

Last Updated on September 28, 2020

Dorothy Kern

Welcome to Crazy for Crust, where I share recipes that are sometimes crazy, often with a crust, and always served with a slice of life.

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  1. I originally saved this recipe for my son in law who loves anything funfetti. Looking at the photo I thought the white chunks were marshmallow and not white chocolate chips. At first I was disappointed but then I thought, why not go ahead and make it anyway and substitute the marshmallows for the chips. Omg! This turned out delicious. I made them for my son in laws birthday but my husband and I had a good part of them before giving him the rest . Delicious and now this recipe is in my file to make again and again. Very easy to make. Thank you!

  2. So it’s my big pet peeve when someone says they tried the recipe and liked it, but they changed 10 ingredients when they made it. When I first pinned this for my son in law (who is a lover of all things funfetti and marshmallow) I thought that the white Middle were mini marshmallows and not white chocolate. I decided to go ahead and make it and substitute the white chocolate for marshmallows, and oh my goodness, they are absolutely wonderful ! Thank you for another great recipe to add to my files. Try it!

  3. Just made 2 pans of these for a picnic tomorrow. The first pan I followed the recipe. The second pan I changed up a bit with chocolate cake mix (skipped the sprinkles), peanut butter chips, and about a tablespoon of peanut butter stirred into the condensed milk. Both versions came out perfectly.

  4. This recipe looks amazing and something I would want to eat right now! Can you think of a substitute for sweetened condensed milk? Any non-dairy subs?

    1. I believe they make sweetened condensed coconut milk. If you can’t find it, it’s easy to make yourself 😊

  5. They are epically good! Someone made them for me right after I had my first baby, they are fantastic. I always double the recipe and use funfetti cake mix 🙂

  6. Question: do the wc chips harden once these cool, or do they melt with the scm and keep gooey? I was wondering, if they harden, could i drizzle a wc ganache instead to maximize on the gooeyness?

  7. Very excited to try this! I know you were fine tuning your recipe when you reposted this on Instagram so, I wanted to double check that using salted or unsalted butter was still okay? Were there any differences making it with one or the other?

    1. hey, I’m just a reader but the main reason to use unsalted butter is to control the amount of salt in a recipe; i’m pretty sure cake mix includes salt which is why it’s best to use unsalted butter here 🙂