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Birthday Cake Blondies

Lisa Flinn
These soft and chewy Birthday Cake Blondies are loaded with golden Oreo cookie pieces, white chocolate chips and rainbow sprinkles! 
5 from 3 votes
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Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Course Brownies & Bars, Dessert
Cuisine American
Yields 9 to 16 Pieces

INGREDIENTS

  • ¾ Cup (170g |12 Tablespoons) Unsalted Butter melted
  • 1 ⅓ Cup (267g) Light or Dark Brown Sugar packed
  • 1 Whole Large Egg + 1 Yolk room temp
  • 1 Tablespoon Clear Vanilla see note below
  • 1 ½ Cups (190g) All-Purpose Flour
  • ½ Teaspoon Fine Sea Salt
  • ½ Cup (86g) White Chocolate Chips
  • 8 Golden Oreo Cookies roughly chopped
  • ¼ Cup Rainbow Sprinkles

Instructions
 

  • Place a rack in the center of the oven and preheat it to 350ºF (176ºC).
  • Prepare an 8x8 inch (20x20 cm) square pan by buttering and lining it with parchment paper. Make sure to leave a 1-inch (2.5 cm) overhang for easy removal.
  • In a large mixing bowl, and using a hand whisk, whisk together slightly cooled melted butter and brown sugar until combined.
    ¾ Cup (170g |12 Tablespoons) Unsalted Butter
    1 ⅓ Cup (267g) Light or Dark Brown Sugar
  • Next, whisk in 1 whole egg, 1 yolk and clear vanilla until light and fluffy; about 2 minutes.
    1 Whole Large Egg + 1 Yolk
    1 Tablespoon Clear Vanilla
  • Sift in the all-purpose flour and salt. Mix until there are very few flour streaks left. Do not overmix.
    1 ½ Cups (190g) All-Purpose Flour
    ½ Teaspoon Fine Sea Salt
  • Add golden Oreo cookie pieces, white chocolate chips and rainbow jimmies and gently fold in to the batter. 
    8 Golden Oreo Cookies
    ½ Cup (86g) White Chocolate Chips
    ¼ Cup Rainbow Sprinkles
  • Transfer the batter to your prepared pan. Use an offset spatula to evenly spread the batter in the pan. Add a few more cookie pieces and sprinkles on top if you wish and bake for 25 to 27 minutes. Do not overbake!
  • Allow to cool completely at room temperature or in the fridge for a few hours. Cut into 9 or 16 equal pieces and ENJOY!

Notes

Clear vanilla will gives these funfetti bars that classic, nostalgic birthday cake flavor. If you do not have any, you can substitute with 2 teaspoons of pure vanilla paste or extract. You can also use 1 teaspoon (or to taste) of pure almond extract.
Keyword birthday cake, brown sugar blondie, cookie bars, funfetti blondies, golden oreo blondies, golden oreos, oreo blondies, oreo cookie bars, rainbow jimmies, sprinkles
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