Funfetti Cake Batter Blondies
If you’re a fan of chewy blondies and birthday cake flavor, these Funfetti Cake Batter Blondies are about to become your new favorite treat. They’re thick, soft, and bursting with colorful sprinkles and nostalgic cake batter goodness in every bite. 🎉
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Whether you’re celebrating a birthday, throwing a bake sale, or just want to brighten up your week with something sweet, these blondies are guaranteed to bring the fun.
🎂 Ingredients
- 1 box funfetti cake mix
- ½ cup unsalted butter, melted
- 1 egg
- ⅓ cup milk
- ½ cup white chocolate chips (optional)
- 2 tbsp rainbow sprinkles (plus more for topping)
🛒 Shop Essentials
👩🍳 Instructions
1. Prep
- Preheat oven to 350°F and grease or line an 8×8 baking pan.
2. Mix
- In a large bowl, mix the cake mix, melted butter, egg, and milk until a thick batter forms.
- Fold in white chocolate chips and sprinkles.
3. Bake
- Spread batter evenly into prepared pan and top with additional sprinkles.
- Bake for 20–25 minutes or until the edges are golden and a toothpick comes out with a few moist crumbs.
- Cool completely before cutting into squares.
🎉 Why You’ll Love These Blondies
- ✅ Only 5 ingredients
- ✅ No stand mixer required
- ✅ Bright, festive, and fun
- ✅ Soft, chewy texture that stays fresh for days
🎈 Fun Variations
- Birthday Blondies: Stir in ½ cup of crushed golden Oreos
- Chocolate Dip: Dip half of each bar in melted white or dark chocolate
- Marshmallow Swirl: Swirl in ¼ cup of marshmallow fluff before baking
- Frosted Finish: Add a layer of buttercream or cream cheese frosting once cooled
📦 Storage Tips
- Store in an airtight container at room temperature for up to 5 days
- Freeze in a single layer wrapped in plastic for up to 2 months
- Let thaw at room temp before serving for best texture
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💬 Reader Reviews
“So chewy and full of sprinkles! We make these for every birthday party now.” – Brianna C.
“The easiest blondies I’ve ever made. I added marshmallow and it was AMAZING.” – Max T.
🎉 How to Serve Funfetti Cake Batter Blondies at Your Next Party
These colorful, chewy bars are more than just a sweet snack—they’re a dessert table centerpiece waiting to happen. Here’s how to make them look as good as they taste:
🧁 Party Platter Perfection
Cut your blondies into small 2-inch squares and arrange them in a checkerboard pattern on a white or pastel-colored platter. Top with an extra dusting of rainbow sprinkles and edible glitter for a festive finish.
Pair them with:
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Mini cupcakes
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Frosted sugar cookies
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Candy jars or chocolate-dipped pretzels
Add toothpick flags with messages like “Happy Birthday!” or “Treat Yourself” for a professional party vibe.
🎈 Individual Wraps for Gifting or Bake Sales
Wrap each blondie in parchment or cellophane and tie with colorful ribbon. Add a sticker label that says “Baked with love” or “Funfetti inside!” Great for:
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Birthday goodie bags
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Bake sales
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Teacher thank-you gifts
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Graduation dessert boxes
🎨 Creative Blondie Customization Ideas
Take your blondies to the next level with these fun mix-ins and add-ons:
🍪 Cookie Crumble
Mix in ½ cup of crushed vanilla sandwich cookies or golden Oreos for extra texture and flavor.
🥜 Peanut Butter Swirl
Drop small spoonfuls of peanut butter on top of the batter and swirl it in before baking.
🍓 Berry Pop
Fold in freeze-dried strawberries or raspberry bits for a fruit-and-cake combo.
🍫 Chocolate Chunk Upgrade
Replace white chocolate chips with milk or dark chocolate chunks—or mix all three!
🍬 Candy Crumble Topping
After baking, drizzle melted white chocolate over the bars and sprinkle with crushed candy like M&Ms, chocolate pearls, or toffee bits.
These variations make your blondies even more memorable and easy to tailor to any occasion or season.
🛍️ Make-Ahead and Big-Batch Baking Tips
Whether you’re prepping for a birthday bash or a big event, these blondies scale beautifully and hold up well:
✅ Double Batch Directions
Use a 9×13 pan for double the recipe. Line with parchment for easy lift-and-cut action. Increase bake time to 28–32 minutes, but don’t overbake—edges should be golden, but center soft.
✅ Freezer-Friendly Fun
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Cool blondies completely
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Slice and wrap individually in plastic wrap
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Store in a zip-top bag or container in the freezer for up to 2 months
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Thaw at room temperature or microwave for 10–15 seconds
Perfect for stashing away emergency party treats!
✅ Add to Dessert Boards
Funfetti Blondies make a colorful addition to any dessert grazing board. Pair them with:
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Dipped pretzels
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Chocolate bark
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Mini doughnuts
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Dried fruit
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Pastel macarons
Ideal for baby showers, gender reveals, birthdays, or bridal brunches.