Birthday Cake Blondies

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!

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

1. Add the egg, yellow cake mix, vegetable oil, milk, and vanilla extract into a large bowl, whisk the ingredients together thoroughly.
2. Fold the sprinkles into the batter gently.
3. Spread the batter out evenly into a prepared baking pan and top with more sprinkles.
4. 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!

This recipe was originally published in March 2014 and was updated in January 2022 with new photos and clearer recipe instructions.