Cake Batter Blondies are chewy, sweet, loaded with sprinkles, and topped with marshmallow buttercream! They start with a cake mix, with a few added ingredients including marshmallows to up the chewy factor! The prettiest blondies you will ever make!
Top these blondies off with my sweet Party Frosting aka Marshmallow Buttercream!

Cake Batter Blondies are the Perfect Party Dessert!
I made these Cake Batter Blondies way back in 2011, but thought they might need a little facelift! I snapped a few new pictures and thought that I’d bring these beauties back up to the top of your newsfeed again!
What’s not to love about a sprinkle filled, buttery bar topped with fluffy marshmallow buttercream frosting? If you’re looking for a party party treat, this is the easy dessert recipe for you!
It All Starts With A Cake Mix!
The beauty of these blondies is they start with a cake mix! I used Funfetti, because SPRINKLES! But you can certainly use any flavor that you would like. If you’re going for that true “cake batter” flavor, I do recommend that you use any version of vanilla.
Starting with a cake mix is definitely a short-cut. You use the dry cake mix as an ingredient, so don’t prepare the cake according to the package directions. Use it as you would any other dry ingredient.
Add Marshmallows!
Adding marshmallows into the batter makes these blondies extra chewy! It’s a pretty simple ingredient to add that really amps up the chewy factor. They kind of melt into the batter as it bakes, like a secret sweet ingredient.

Ingredients For Cake Batter Blondies…
- 1 box vanilla cake mix. I used Funfetti, but you can get creative with other flavors!
- Vegetable oil
- Egg
- Milk
- White chocolate chips. If you use a chocolate cake mix you can use chocolate chips instead! Or if white chocolate isn’t your thing you can leave them out!
- Mini marshmallows to add extra chewiness

Add Frosting…Or Don’t…
If frosting isn’t your thing, you can absolutely leave it off! I made some without and added some extra sprinkles on top instead.
These blondies are very sweet already, so leaving it off is fine, although I am always up for adding frosting when I can.
I do like to press sprinkles into the top, though, as the batter is a bit thick and the tops of these blondies can be a bit lumpy and not as pretty when baked.
Looking For Other Cake Mix Recipes? Try These:
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Cake Batter Blondies
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Total Time: 35 minutes
- Yield: 16 1x
- Category: Cake Mix Recipe
- Method: Oven
- Cuisine: Dessert
Description
These blondies are the ultimate sweet treat! Loaded with sprinkles and topped with marshmallow frosting, these Cake Batter Blondies are a party treat!
Ingredients
- 1 box vanilla cake mix (I used Funfetti)
- 1/4 cup vegetable oil
- 1 egg
- 1/2 cup milk
- 1/2 cup white chocolate chips
- 1/2 cup mini marshmallows
Instructions
- Preheat oven to 350°F. Coat a 9×9 baking dish with nonstick spray. Set aside.
- In the bowl of your stand mixer fitted with the paddle attachment combine the dry cake mix, vegetable oil, egg and milk. Mix on medium low speed until the ingredients are just combined. Batter will be dense.
- Stir in your chips and marshmallows until distributed evenly.
- Spread into your prepared pan.
- Bake for 25 minutes until center is just set.
- Allow to cool completely before frosting.
Notes
Top this with my Marshmallow Buttercream (aka Perfect Party Frosting). Cut the recipe in half for the perfect amount for these blondies!
Store airtight at room temperature for 3 days.
Nutrition information is for unfrosted blondies.
Nutrition
- Serving Size:
- Calories: 181
- Sugar: 16.2 g
- Sodium: 194.3 mg
- Fat: 7.6 g
- Carbohydrates: 26.7 g
- Protein: 2 g
- Cholesterol: 12.9 mg
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So sorry, forgot to tell you how delicious your Cake Batter Blondies look 🙂
This is the best post ever involving Pinterest! I’ve only peeked at this new blogging activity as I know I don’t have the time to get really involved with it yet. However, I was involved with someone who ate Vienna Sausages, a lot! My ex-husband loved them. Having said that, he also believed that Newfoundland Screech was the best thing to hit the liquor industry since the end of Prohibition.
LMAO!! Great story!! And thank you for not getting so caught up in Pinterest that you start to neglect your blog, which I’ve noticed seems to be happening in the blog world 😉
Hilarious childhood story… love the cake batter blondies!
going to ask the dreaded question..you think that I could use the sugar free cake mix for this recipe..My husband has diabetes, (recent) so I been snooping to change up recipes for him
I don’t see why not…there shouldn’t be too much of a difference 😉
I love your lesson…so very true! And Bongo jeans…I so wanted them too. I think I finally got a pair of Bongo jean shorts in middle school and wore them until they had holes in them!
OMG! You just made my day with this post! I’ve got a host of mental imagery of everything you wrote, down to the smell of the Vienna sausages! It’s amazing how we perceive others to be “cool” only to suffer from huge let-downs. But in the end- it’s the lesson that’s important. In my house, vienna sausages were reserved for serving with (meaning in) Spanish rice. We all loved it, but I recall my 1st experience with raw celery smothered in peanut butter and being astonished that Americans could eat such a thing. LOL! In the end-I had to get used to whatever the lunch ladies served- we also “payed taxes”. Thanks for the recipe too!! I’ll have to try it!-Raquel
Ok, I had to read this twice because the first time I read it, I couldn’t move past the fact that in 1985, when YOU were in 5th grade, I was a senior in high school. Gah! 🙁
I LOVE how you always have the best/funniest posts before your recipes.
Vienna sausages ARE like dog food. And I don’t mean that in a good way. If there even is a good way to compare people food to dog food. Which there isn’t.
So, yes. Vienna sausage = puke.
Oh my word! You are PRECIOUS! and I dare say this would preach! Isn’t contentment the most beautiful gift!? I love your inspiring ideas and your witty commentary! I made the peanut butter and chocolate bugles and I would love permission to send the recipe on to the Sweet Potato Queens of Jackson, MS. If you are not familiar with the group you should check it out! They are right up your alley! Have a great day! God bless!