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. If you don’t happen to like semi-homemade recipes, feel free to try my perfect Blondie Recipe that is from-scratch!
It’s a cake…it’s a cookie…it’s a Birthday Blondie! It is hard to know what name to give this dessert. It’s not a brownie, since it is made with cake mix. And, it’s full of crushed Golden Oreo cookies, which makes it part-cookie. What I do know is that it is a dense, delicious sweet treat that sure is pretty with all of the rainbow sprinkles baked in it! The white chocolate chips also add to the flavor of this dessert that would be perfect for a birthday treat!
Birthday Blondies Recipe
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!
Ingredients (full recipe below)
- White cake mix
- Rainbow sprinkles
- White chocolate chips
- Oreo Golden Sandwich Cookies
- Vegetable Oil
How to Make Birthday Blondies
This is such a quick and easy treat that could definitely be served in place of a birthday cake. The rainbow sprinkles make it a little extra special for that special day. I think it’s fine to make even if there is not a birthday celebration. All the colors will make you smile.
To make the Birthday Blondies, preheat the oven to 350°F and get out a large bowl. First, combine the cake mix, sprinkles, white chocolate chips, and crushed Oreos in the bowl. Next, add the eggs, vegetable oil, and milk. Blend well. If the mixture is too thick, add a little more milk.
Pour the mixture into a greased 8×8-inch baking dish and bake for 20-22 minutes. They will almost look not quite done and may sink in the middle just a little bit. Chill them in the refrigerator for about 45 minutes before cutting into them. I cut the bars into twelve pieces, but you could definitely make them bigger and cut them into nine bars.
How to Store the Bars
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.
Looking for More Birthday Treats?
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.
Calories: 388 kcal
(15.25 ounces) white cake mix
white chocolate chips
Golden Sandwich cookies,
crushed (with filling)
In a large bowl combine the cake mix, sprinkles, white chocolate chips, and crushed Oreos.
Add the eggs, vegetable oil, and milk and blend well. (Add more milk if the mixture is too thick.)
Pour the mixture into a greased 8×8-inch baking pan.
Let the bars chill in the refrigerator for about 45 minutes before cutting and serving.
This recipe was inspired by @hadleyadair on TikTok.
Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.