Get ready for a colorful treat that will brighten any celebration! Funfetti Birthday Cake Blondies are the perfect blend of rich flavors and vibrant sprinkles. They’re easy to make and simply delicious. Whether you’re hosting a party or craving something sweet, these blondies will wow your friends and family. Let’s dive into the details and whip up this tasty dessert together!
Why I Love This Recipe
- Deliciously Chewy: These blondies have a perfect chewy texture that makes them incredibly satisfying to eat.
- Colorful Celebration: The rainbow sprinkles add a festive touch, making them perfect for birthdays or any celebration.
- Quick and Easy: With a simple mixing process, these blondies come together in no time, making them a go-to treat for any occasion.
- Customizable Delight: You can easily add your favorite mix-ins, like nuts or chocolate chips, to personalize these blondies to your taste.
Ingredients
Main Ingredients
- 1 cup unsalted butter (melted)
- 1 cup brown sugar (packed)
- 1/2 cup granulated sugar
- 2 large eggs
- 2 teaspoons vanilla extract
These main ingredients form the base of your blondies. The melted butter gives them a rich, moist texture. Brown sugar adds a deep, caramel flavor, while granulated sugar balances the sweetness. Eggs help bind everything, creating a soft, chewy treat. Vanilla extract adds a lovely aroma that makes these blondies even more inviting.
Dry Ingredients
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon baking soda
- 1/4 teaspoon salt
This mix of dry ingredients is crucial. Flour provides structure, while baking powder and baking soda help the blondies rise. A pinch of salt enhances all the flavors. Be careful not to overmix when you combine these with the wet ingredients. This keeps your blondies soft and chewy.
Mix-Ins
- 1/2 cup rainbow sprinkles (plus more for topping)
- 1/2 cup white chocolate chips (optional)
These fun mix-ins make the blondies special. Rainbow sprinkles bring color and joy, perfect for any celebration. If you love white chocolate, add those chips for extra sweetness. They melt slightly, adding a creamy texture that pairs well with the blondies. Don't skimp on the sprinkles on top for that festive look!

Step-by-Step Instructions
Preparing the Oven and Dish
- Preheat the oven to 350°F (175°C).
- Line a 9x13-inch baking dish with parchment paper.
Start by preheating your oven. This step ensures your blondies bake evenly. Next, line your baking dish with parchment paper. Leave some paper hanging over the sides. This helps you lift out the blondies after baking.
Mixing Wet Ingredients
- Combine melted butter, brown sugar, and granulated sugar.
- Whisk until smooth and glossy.
- Add eggs and vanilla extract, mixing well.
In a large bowl, mix melted butter with brown sugar and granulated sugar. Whisk until the mix looks shiny and smooth. Now, crack in the eggs and pour in the vanilla extract. Whisk again until everything is well combined.
Incorporating Dry Ingredients
- Whisk together flour, baking powder, baking soda, and salt in a separate bowl.
- Gradually mix dry ingredients with wet ingredients, avoiding overmixing.
In another bowl, whisk together flour, baking powder, baking soda, and salt. Slowly add this mixture to your wet ingredients. Stir gently to combine. Be careful! Overmixing can make your blondies tough.
Adding Funfetti Elements
- Fold in rainbow sprinkles and optionally white chocolate chips.
- Pour batter into the prepared dish and top with extra sprinkles.
Now it's time for the fun part! Fold in the rainbow sprinkles. If you like, add white chocolate chips too. Pour this colorful batter into your lined dish, spreading it evenly. Top with more sprinkles for extra fun!
Baking
- Bake for 25-30 minutes until golden brown.
- Check doneness with a toothpick.
Place your dish in the oven and bake for 25 to 30 minutes. The blondies should turn golden brown. To check if they're done, insert a toothpick into the center. If it comes out clean or with a few crumbs, they’re ready!
Cooling and Serving
- Allow to cool in the pan for 15 minutes then remove using parchment overhang.
- Let cool completely before slicing into squares.
Once baked, let the blondies cool in the pan for about 15 minutes. Use the parchment paper to lift them out. Allow them to cool completely before cutting into squares. Enjoy your colorful treat!
Tips & Tricks
Achieving the Perfect Blondies
To make the best blondies, avoid overmixing the batter. Stir just until you see no dry flour. This keeps your blondies soft. For baking, set your timer for 25 minutes. Check with a toothpick. If it comes out clean, they’re done. The edges should be golden brown. If you need more time, check every two minutes.
Serving Suggestions
For a fun presentation, serve your blondies on a colorful platter. Add extra sprinkles on top for a bright look. You can also drizzle melted white chocolate over them. This adds sweetness and makes them look fancy. Just melt the chocolate, then use a spoon to drizzle.
Ingredient Substitutions
If you need gluten-free options, swap the all-purpose flour with a gluten-free blend. Make sure it measures the same. For dairy-free blondies, use coconut oil instead of butter. You can also find dairy-free chocolate chips. If you want to cut back on sugar, reduce the brown sugar by a quarter cup. Your blondies will still taste great!
Pro Tips
- Use Room Temperature Eggs: Make sure your eggs are at room temperature for better incorporation into the batter, resulting in a smoother texture.
- Don't Overmix: When combining wet and dry ingredients, mix just until combined to keep the blondies soft and chewy.
- Chill Before Baking: If you have time, chill the batter for 30 minutes before baking. This helps the flavors develop and creates a thicker blondie.
- Store for Freshness: Keep the blondies in an airtight container at room temperature for up to a week for optimal freshness.
Variations
Different Flavor Profiles
You can easily change the flavor of your Funfetti birthday cake blondies. Try adding a splash of almond or coconut extract. This small change makes a big difference. It adds a lovely depth to the taste. You can also use different types of chocolate chips. Dark chocolate chips give a rich flavor. Milk chocolate chips add a sweet touch. Mixing these options can make each batch unique.
Seasonal Variations
These blondies can fit any holiday. For Halloween, use orange and black sprinkles. For Christmas, try red and green. You can even make special themed blondies for birthdays. Just pick your favorite sprinkles to match the theme. It makes your treats look more festive and fun.
Healthier Alternatives
If you want a healthier version, there are easy swaps. You can reduce the sugar or try using natural sweeteners like honey or maple syrup. This keeps the blondies sweet but lowers the sugar count. Adding nuts like walnuts or pecans can give extra crunch. Dried fruits like cranberries or apricots can add a nice chew. Both options boost the flavor and nutrition of your blondies.
Storage Info
Storage Guidelines
To keep your blondies fresh, store them in an airtight container. This helps block moisture and keeps them soft. I recommend using a glass or plastic container with a tight seal. Place a piece of parchment paper between layers if stacking. This will prevent them from sticking together.
Freezing Instructions
If you want to save some blondies for later, freezing is a great option. Cut them into squares before freezing. Wrap each square in plastic wrap, then place them in a freezer-safe bag. When you want to enjoy them, take out a square and thaw it in the fridge overnight. This keeps the texture nice and chewy.
Shelf Life
At room temperature, your blondies will last about 3-4 days. If you store them in the fridge, they can stay fresh for up to a week. Just remember, the colder they get, the firmer they will be. So, if you want that soft, gooey texture, enjoy them at room temp!
FAQs
What are Funfetti Birthday Cake Blondies?
Funfetti Birthday Cake Blondies are soft, chewy squares packed with colorful sprinkles. They have a sweet, buttery flavor and a light, cake-like texture. The vibrant sprinkles make them perfect for celebrations. You can serve them as a fun twist on traditional birthday cake. They are easy to make and always bring joy to any gathering.
Can I use different types of sprinkles?
Yes! You can use any sprinkles you like. Mix in chocolate sprinkles, star-shaped sprinkles, or seasonal ones for a festive touch. Just make sure to use the same amount as the recipe calls for. You can also try edible glitter for a special shine. Customize your blondies to match the theme of your party!
How do I know when blondies are done baking?
To check if your blondies are done, look for a golden edge. Insert a toothpick into the center. If it comes out clean or with a few moist crumbs, they are ready. If the toothpick has wet batter, bake for a few more minutes. Keep an eye on them to avoid overbaking. Perfectly baked blondies are soft and chewy.
Can I make this recipe in advance?
Yes, you can make these blondies ahead of time! Bake them a day or two before your event. Once they cool, store them in an airtight container. They will stay fresh and tasty. If you want to freeze them, cut them into squares first. Wrap each piece in plastic wrap and then place them in a freezer bag. Thaw them in the fridge before serving.
You learned how to make Funfetti Birthday Cake Blondies step by step. From gathering ingredients to baking and serving, each step matters. Remember, mixing too much can ruin the texture. Enjoy adding your own flavors or mix-ins for fun twists. Store them right to keep that fresh taste. Baking these blondies can bring joy to any occasion. I hope you enjoy making and sharing this delicious treat!