Double Decker Birthday Cake Blondie Bites
If you’re on the hunt for a delightful treat that’s perfect for celebrations, look no further than these Double Decker Birthday Cake Blondie Bites! They’re soft, chewy, and decadently rich, boasting two layers of flavor that will take your taste buds on an unforgettable journey. With a delicious blondie base topped with creamy frosting and a sprinkle of colorful confetti, these bites are a surefire way to make anyone’s birthday even more special. Whether you’re planning a big bash or just want to indulge on a regular Tuesday, these blondie bites are here to brighten your day.
Why This Double Decker Birthday Cake Blondie Bites Stands Out

These Double Decker Birthday Cake Blondie Bites are not your average dessert. They combine the rich, buttery flavor of traditional blondies with the fun and celebratory elements of a birthday cake. The double-layered approach gives you the best of both worlds: a soft, chewy base complemented by a creamy frosting that’s reminiscent of classic birthday cake. Plus, the addition of sprinkles not only adds a pop of color but also elevates the entire dessert experience. Perfectly portioned, these bites are easy to share, making them ideal for parties or get-togethers.
What Goes In
To make these delightful bites, you’ll need the following ingredients:
- 2 1/8 cups all-purpose flour
- 1/2 teaspoon salt
- 12 tablespoons butter, melted and cooled slightly
- 1 cup light brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 2 1/2 teaspoons vanilla extract
- 1 stick unsalted butter (for frosting)
- 3 cups confectioners’ sugar (for frosting)
- 3/4 cup unsweetened cocoa powder (for frosting)
- 4 tablespoons whole milk or half and half (for frosting)
- 1/4 teaspoon salt (for frosting)
- 1 teaspoon vanilla (for frosting)
- 1 stick unsalted butter (for second layer of frosting)
- 3 1/2 cups confectioners’ sugar (for second layer of frosting)
- 4 tablespoons whole milk or half and half (for second layer of frosting)
- 1/4 teaspoon salt (for second layer of frosting)
- 2 teaspoons vanilla (for second layer of frosting)
- Sprinkles for decoration
Must-Have Equipment
Before you get started, make sure you have the following equipment on hand:
- Mixing Bowls: For combining ingredients.
- Whisk: To mix and aerate the batter.
- 9×13-inch Baking Pan: Ideal for baking your blondies.
- Spatula: For spreading frosting evenly.
- Measuring Cups and Spoons: Accurate measurements are key for baking.
- Parchment Paper: To line your baking pan for easy removal.
Double Decker Birthday Cake Blondie Bites — Do This Next

Let’s get into the nitty-gritty of making these amazing blondie bites!
Step 1: Preheat Your Oven
Preheat your oven to 350°F (175°C). This ensures that your blondies bake evenly.
Step 2: Prepare Your Baking Pan
Line a 9×13-inch baking pan with parchment paper, leaving some overhang on the sides to help with removal later. Grease the parchment for easy release.
Step 3: Mix Dry Ingredients
In a medium bowl, whisk together the all-purpose flour and salt. Set this mixture aside.
Step 4: Combine Wet Ingredients
In a large mixing bowl, combine the melted butter, light brown sugar, and granulated sugar. Whisk until well blended. Add in the eggs and vanilla extract, mixing until smooth.
Step 5: Incorporate Dry Ingredients
Gradually add the flour mixture to the wet ingredients, stirring until just combined. Be careful not to overmix—this keeps your blondies chewy.
Step 6: Bake the Blondies
Pour the batter into the prepared baking pan, spreading it evenly with a spatula. Bake for about 25-30 minutes, or until a toothpick inserted in the center comes out clean. Let the blondies cool in the pan before frosting.
Step 7: Make the First Layer of Frosting
In a mixing bowl, beat together 1 stick of unsalted butter, 3 cups of confectioners’ sugar, 3/4 cup cocoa powder, 4 tablespoons of milk, 1/4 teaspoon salt, and 1 teaspoon vanilla extract until smooth and creamy.
Step 8: Frost the Blondies
Once the blondies are completely cool, spread the chocolate frosting evenly over the top using a spatula.
Step 9: Make the Second Layer of Frosting
In another bowl, beat together 1 stick of unsalted butter, 3 1/2 cups of confectioners’ sugar, 4 tablespoons of milk, 1/4 teaspoon salt, and 2 teaspoons vanilla extract until light and fluffy.
Step 10: Add the Second Layer of Frosting
Spread the second layer of frosting evenly over the chocolate frosting layer, creating a beautiful two-tiered effect.
Step 11: Decorate with Sprinkles
Top the frosted blondies with colorful sprinkles, adding a festive touch.
Step 12: Chill and Cut
Refrigerate the blondies for at least 30 minutes to set the frosting. Once firm, lift the blondies out of the pan using the parchment paper, and cut them into bite-sized squares.
No-Store Runs Needed

Before you dive into making these Double Decker Birthday Cake Blondie Bites, check your pantry! You might have most of these ingredients already:
- All-purpose flour
- Salt
- Butter
- Brown sugar
- Granulated sugar
- Eggs
- Vanilla extract
- Cocoa powder
- Confectioners’ sugar
- Whole milk or half and half
- Sprinkles (optional)
Little Things that Matter
The success of your Double Decker Birthday Cake Blondie Bites hinges on a few key tips:
- Make sure your butter is melted and slightly cooled to avoid cooking the eggs when mixed.
- Use room-temperature eggs for better incorporation into the batter.
- Don’t overbake the blondies—remove them from the oven as soon as a toothpick comes out clean.
- Allow the blondies to cool completely before frosting to prevent melting.
Leftovers & Meal Prep
These blondie bites can be stored in an airtight container at room temperature for up to 3 days. If you want to keep them longer, you can refrigerate them, where they’ll last up to a week. For meal prep, consider cutting the blondies into squares and freezing them; they freeze beautifully! Just pop them in the microwave for a few seconds to enjoy a soft and chewy treat anytime.
Popular Questions
Can I make these blondies gluten-free?
Absolutely! Substitute all-purpose flour with a 1:1 gluten-free blend, and you’ll still achieve those delicious flavors and textures.
What can I use instead of butter?
If you’re looking for a dairy-free alternative, you can use coconut oil or a plant-based butter substitute in equal amounts. Make sure it’s melted for the best results.
Can I add mix-ins to the batter?
Definitely! Feel free to fold in chocolate chips, nuts, or dried fruit for added texture and flavor. Just keep an eye on the total volume to maintain the right consistency.
How can I make these blondies more festive?
In addition to sprinkles, you can add colorful frosting, edible glitter, or even themed decorations for special occasions. Get creative!
Wrap-Up
If you’re ready to elevate your dessert game, these Double Decker Birthday Cake Blondie Bites are the perfect recipe to try. They are easy to make, and the combination of flavors and textures is truly irresistible. Whether it’s a birthday celebration or just a sweet treat for yourself, these blondies are sure to impress. So gather your ingredients, roll up your sleeves, and get ready to make some magic in the kitchen! You won’t regret it, and neither will anyone lucky enough to taste these delightful bites. Enjoy baking and, most importantly, enjoy indulging in these scrumptious Double Decker Birthday Cake Blondie Bites!

Double Decker Birthday Cake Blondie Bites
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). This ensures that your blondies bake evenly.
- Line a 9x13-inch baking pan with parchment paper, leaving some overhang on the sides to help with removal later. Grease the parchment for easy release.
- In a medium bowl, whisk together the all-purpose flour and salt. Set this mixture aside.
- In a large mixing bowl, combine the melted butter, light brown sugar, and granulated sugar. Whisk until well blended. Add in the eggs and vanilla extract, mixing until smooth.
- Gradually add the flour mixture to the wet ingredients, stirring until just combined. Be careful not to overmix—this keeps your blondies chewy.
- Pour the batter into the prepared baking pan, spreading it evenly with a spatula. Bake for about 25-30 minutes, or until a toothpick inserted in the center comes out clean. Let the blondies cool in the pan before frosting.
- In a mixing bowl, beat together 1 stick of unsalted butter, 3 cups of confectioners' sugar, 3/4 cup cocoa powder, 4 tablespoons of milk, 1/4 teaspoon salt, and 1 teaspoon vanilla extract until smooth and creamy.
- Once the blondies are completely cool, spread the chocolate frosting evenly over the top using a spatula.
- In another bowl, beat together 1 stick of unsalted butter, 3 1/2 cups of confectioners' sugar, 4 tablespoons of milk, 1/4 teaspoon salt, and 2 teaspoons vanilla extract until light and fluffy.
- Spread the second layer of frosting evenly over the chocolate frosting layer, creating a beautiful two-tiered effect.
- Top the frosted blondies with colorful sprinkles, adding a festive touch.
- Refrigerate the blondies for at least 30 minutes to set the frosting. Once firm, lift the blondies out of the pan using the parchment paper, and cut them into bite-sized squares.
Notes
- Make sure your butter is melted and slightly cooled to avoid cooking the eggs when mixed.
- Use room-temperature eggs for better incorporation into the batter.
- Don’t overbake the blondies—remove them from the oven as soon as a toothpick comes out clean.
- Allow the blondies to cool completely before frosting to prevent melting.
