Birthday Cake Blondies (Made With Cake Mix)
Birthday Cake Blondies combine rainbow sprinkles, a yellow box cake mix, and 4 pantry staple ingredients to make a deliciously chewy treat!
Cake Batter-y Goodness
These Birthday Cake Blondies are a sweet and delicious treat that’s incredibly easy to make! With just 5 minutes of prep, 35 minutes of baking, and minimal ingredients you get a fun colorful treat that everyone will be excited to eat up!
As much as I enjoy baking from scratch, every now and then I just want something that I can whip together quickly without having to drag out a bunch of ingredients from the pantry. Plus this recipe creates a pretty minimal amount of dishes… now that’s a recipe worth celebrating, am I right?!
These are perfect for those who don’t necessarily like cake but still want something sweet to enjoy at the party! Warm them up and make Birthday Cake Blondie Sundaes and skip the cake altogether. Just put a candle in a blondie and you’re good to go!
Rebecca’s Recipe Review
Taste: Sweet cake batter-y flavor highlighted with the taste of vanilla.
Texture: Chewy, brownie-like texture.
Ease: 2/10
Pros: Minimal ingredients and doesn’t cause a big kitchen mess, yet delivers an amazing, sweet treat!
Cons: Will require self-discipline not to eat the entire batch yourself since these blondies are THAT good!
Would I Make This Again? Yes, this is a repeat recipe in our house!
Ingredients For Birthday Cake Blondies
If you’re in need of a tasty treat that takes no time to put together and bakes up quickly, look no further than this Cake Batter Blondie Recipe! To whip up a batch you’ll need a boxed yellow cake mix, vegetable oil, whole milk, an egg, vanilla extract, and rainbow sprinkles!
I’d recommend sticking with the long, thin rainbow jimmies since they hold their shape the best when baking. Using other sprinkles like nonpareils, may break down and bleed into the batter.
Love mixing up recipes to create yummy and fun variations? Swap out the yellow cake mix for any boxed cake mix of your choice! Try a chocolate cake mix, red velvet, strawberry, or even just a white cake mix!
For added sweetness, you can add white chocolate chips to this recipe!
How To Make Birthday Cake Blondies
- Add the egg, yellow cake mix, vegetable oil, milk, and vanilla extract into a large bowl, whisk the ingredients together thoroughly.
- Fold the sprinkles into the batter gently.
- Spread the batter out evenly into a prepared baking pan and top with more sprinkles.
- Bake at 350 degrees F until golden brown or when a toothpick inserted into the center of the blondies comes out clean. For best results, allow them to cool completely in the baking dish before slicing and serving!
How To Store Birthday Cake Blondies
Keep these Cake Mix Blondies stored in an airtight container kept at room temperature. Enjoy within a week!
Freeze Cake Mix Blondies To Enjoy Later!
To do so, first allow the blondies to completely cool. Then slice them into individual serving sizes and wrap them tightly in plastic wrap. Place the wrapped squares into a Ziploc freezer bag, then put it in the freezer for up to 3 months.
Grab another sprinkle-loaded dessert recipe that’s fun AND delicious:
- Quick Funfetti Birthday Cake Dip – Made with vanilla pudding, Cool Whip, and white cake mix!
- Funfetti Ice Cream Bread – No rising or kneading required for this lightly sweet and tender bread!
- Birthday Cupcakes – Fluffy vanilla almond cupcakes topped with a 4-ingredient whipped frosting!
- Homemade Funfetti Cake – White cake filled with rainbow sprinkles!
- Two Layered Funfetti Sugar Cookie Dough Cake – White almond cake, loaded with sprinkles, and a layer of edible sugar cookie dough!
Did You Make This Recipe?
If you’ve tried this recipe, please let leave a review in the comments below. I love hearing from you! Don’t forget to tag me – @sugarandsoulco – on Instagram and Pinterest with your photos, or join our Sugar & Soul Show-offs Community and share them there.
This recipe was originally published in March 2014 and was updated in January 2022 with new photos and clearer recipe instructions.
Birthday Cake Blondies
Ingredients
- 1 (15oz.) box yellow cake mix
- ¼ cup vegetable oil
- 3 tablespoons whole milk
- 1 large egg
- 1 tablespoon vanilla extract
- ½ cup rainbow sprinkles
Instructions
- Preheat the oven to 350°F and grease a 9×9-inch baking pan or line it with parchment paper and set aside.
- Mix together the cake mix, vegetable oil, milk, egg, and vanilla extract. The batter should be well mixed but stiff.
- Transfer batter to the prepared baking pan and spread evenly with a rubber spatula. Bake for 30 to 35 minutes until a toothpick comes clean from the center of the blondies.
- Blondies should rest for a couple of hours before cutting for best results.
Video
Notes
- This recipe will work with any cake mix flavor if you want to mix it up.
- Add a layer of frosting for a true cake-like experience.
Nutrition
Did You Make This Recipe?
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How do I adjust for a different weight cake mix – ex, 13.25oz box?
Hey Rebecca- These look wonderful! Could Funfetti cake mix be used in this recipe instead of yellow? Thanks so much!
Yes, it could!
These were tasty and definitely had that birthday cake taste. Though mine were still more like a dense cake than a chewy blondie so may try playing around with the amount of oil.
I’m glad you liked them, let me know how the oil experiment works out!
Mine turned out amazing! Mine did turn out a little chewy to, but it well reminded me of a delicious blondie. Mine tasted like a blondie, but it doesn’t look like one though. It looked a little brown, but it’s probably because of the cake mix I used. I think next time I’ll do a little less milk,hopefully then it will be less chewy. All in all, it’s an amazing recipe and it will sure be a hit at my bake sale!
What a fun and easy treat.
Thanks for sharing on Creative K Kids’ Tasty Tuesdays link up. Hope to see you back next week.
These are so fun!! Love all the colour and perfect for someone like my fiancé who doesn’t really like cake (it’s his birthday on Friday!).
These are so cute! These would make a great alternative to birthday cupcakes!
They’d be perfect for that!
Love the fact that you made this with a boxed cake mix! It looks lovely and super delicious 🙂 Thank you for sharing, Rebecca!
Thanks, Maria! The box mix makes these so easy!
It’s dangerous for me to know about this recipe. Looks sooooo good.
These are so pretty! I was debating on making funfetti brownies this week on my blog!! (I opted for some loaded cookies though that are super delicious!) but I might be making these with the rest of my giant sprinkle jar this weekend! So fun! 🙂
Those loaded cookies sure sound good! Thanks so much for stopping by!
I am so excited about these because I love blonde brownies and I love funfetti! My kids would love this as well! Thank you for sharing!
Yum! These bars look pretty tasty! <3 Yum!
Those look absolutely amazing. Pinning for later!
Those look absolutely amazing. Pining for later!