Birthday Blondies are easy but delicious dessert cake bars that are full of white cake mix, white chocolate chips, Golden Oreos, and lots of colorful sprinkles. It’s a cake…it’s a cookie…it’s a Birthday Blondie! If you don’t happen to like semi-homemade recipes, feel free to try my perfect Blondie Recipe which is from scratch!
Ingredients & Substitutions
This dessert is so easy to make and it looks so good that you don’t have to worry about not baking a cake for your birthday! Just whip up these cake bars and celebrate!
Cake Mix: I prefer to use white cake mix for the blondies.
White Chocolate Chips: The white chocolate chips add flavor to the bars that make them perfect for a birthday treat. In fact, I have White Chocolate Blondies you may want to try, too!
Cookies: Look for Oreo Golden Sandwich Cookies.
Sprinkles: Rainbow-colored sprinkles just make me smile. However, you could certainly use sprinkles that were the color of your theme or party.
How to Store Birthday Blondies
These cake bars store well at room temperature or the refrigerator for up to two weeks. Be sure to keep them in a covered container. If you want to freeze them, they will last up to three months in a freezer-safe container. Be sure to label and date the containers and let them thaw overnight in the refrigerator.
- 1 box (15.25 ounces) white cake mix
- 2 large eggs, room temperature
- ¼ cup (54.5 g) vegetable oil
- 3 tablespoons milk
- 1 cup rainbow sprinkles
- 1 cup (168 g) white chocolate chips
- 10 Oreo Golden Sandwich cookies, crushed (with filling)
- Preheat oven to 350°F. Spray a 9×9-inch baking dish with nonstick cooking spray.
- In a large bowl combine the cake mix, eggs, vegetable oil, and milk and blend well. (Add more milk if the mixture is too thick.)
- Add the sprinkles, white chocolate chips, and crushed Oreos.
- Pour the mixture into the greased 8×8-inch baking pan.
- Bake for 20-22 minutes.
- Let the bars chill in the refrigerator for about 45 minutes before cutting and serving.
Did you make this recipe?
Thank you for making my recipe! You took pictures, right? Well go ahead and post them on Instagram! Be sure to mention me @iambaker and use the hashtag #YouAreBaker.
This recipe was inspired by @hadleyadair on TikTok.