Gluten-Free Funfetti Cake Mix Blondies
These soft, chewy blondies transform yellow cake mix into an irresistible bar cookie studded with colorful rainbow sprinkles. The texture falls perfectly between a brownie and a cookie - dense yet tender with delightful pops of color throughout. Made with just six simple ingredients, they're an ideal treat for birthday parties, school events, or whenever you want something sweet and festive. The cake mix base ensures consistent results every time, while the sprinkles add both visual appeal and a subtle vanilla crunch. Perfect for bakers of all skill levels who want impressive results with minimal effort.
Ingredients
- 15 ounces yellow cake mix, (1 box)white cake mix1:1baking
slightly different flavor profile
- ¼ cup vegetable oil
- 3 tablespoons whole milk
- 1 large egg
- 1 tablespoon vanilla extract
- ½ cup rainbow sprinkleschocolate chips1:1flavor
different texture and taste
Instructions
- 1
Preheat oven to 350 degrees F and grease a 9-inch x 9-inch baking pan or line with parchment paper
- 2
Mix together cake mix, vegetable oil, milk, egg, and vanilla extract in a large bowl until well combined but stiff
- 3
Fold in most of the sprinkles with a rubber spatula or wooden spoon, reserving some for topping
- 4
Transfer batter to prepared pan and spread into an even layer with a rubber spatula
- 5
Sprinkle reserved sprinkles over the batter
- 6
Bake for 30 to 35 minutes until a toothpick inserted in center comes out clean
- 7
Remove from oven and let rest for a couple of hours before cutting into 9 bars
Tips
Reserve some sprinkles for sprinkling on top before baking for extra visual appeal and texture contrast.
Let blondies cool completely for clean cuts - rushing this step results in crumbly, messy bars.
Line the pan with parchment paper for easy removal and perfect edges every time.
Good to Know
Store covered at room temperature for up to 5 days or refrigerate for up to 1 week.
Can be made up to 2 days ahead and stored covered at room temperature.
Serve at room temperature cut into squares. Great with milk or coffee.
Common Mistakes
Don't overbake or blondies will be dry and crumbly instead of chewy.
Let cool completely before cutting to avoid crumbly, uneven bars.
Substitutions
slightly different flavor profile
FAQ
Can I use a different size pan?
An 8x8 pan will make thicker bars (bake 5-10 minutes longer), while a 9x13 will make thinner ones (reduce baking time by 5-10 minutes).
What if I don't have rainbow sprinkles?
You can substitute chocolate chips, mini marshmallows, or any small mix-ins. The texture and flavor will change but still be delicious.
How long do these keep?
Store covered at room temperature for up to 5 days or refrigerate for up to 1 week. They can also be frozen for up to 3 months.