Are you ready to bake a treat that's as festive as a birthday party? These Funfetti Birthday Cake Blondies are simple, sweet, and loaded with colorful sprinkles. I’ll guide you through easy steps and share tips to make your blondies the star of any celebration. Whether you're planning a party or just want a sweet snack, this recipe is for you! Let’s get baking!
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Ingredients
Key Ingredients for Funfetti Birthday Cake Blondies
To make these funfetti birthday cake blondies, gather these key ingredients:
- 1 cup (or 2 sticks) unsalted butter, melted
- 1 cup packed brown sugar
- 1/2 cup granulated sugar
- 2 large eggs
- 2 teaspoons pure vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1/2 teaspoon baking soda
- 1/4 teaspoon fine salt
- 1/2 cup rainbow sprinkles (plus extra for garnish)
- 1/2 cup white chocolate chips (optional)
These ingredients work together to create a rich, sweet treat that is soft and chewy.
Optional Add-ins and Toppings
You can add more fun with some optional items:
- White chocolate chips for extra creaminess
- Dark chocolate chips for a richer flavor
- Chopped nuts for a crunchy bite
- More sprinkles on top for added color
Feel free to mix and match based on your taste. Each addition can make your blondies even more special!
Substitutions for Common Ingredients
If you need to swap some ingredients, here are a few ideas:
- Use coconut oil instead of butter for a dairy-free option.
- Brown sugar can be replaced with coconut sugar for a different flavor.
- For a gluten-free option, try almond flour or a gluten-free flour blend.
These substitutions can help you cater to different dietary needs while keeping the blondies delicious!

Step-by-Step Instructions
Prepping Your Baking Dish
Start by preheating your oven to 350°F (175°C). Line a 9x13-inch baking dish with parchment paper. Make sure the paper hangs over the sides. This will help you lift out the blondies later.
Mixing Wet and Dry Ingredients
In a big bowl, pour in the melted butter. Add both the brown sugar and granulated sugar. Whisk them together until the mixture looks smooth and shiny. Next, crack two eggs into the bowl. Add the vanilla extract. Whisk again until everything blends well.
In a different bowl, sift the all-purpose flour, baking powder, baking soda, and salt. Mix these dry ingredients well. This helps them combine evenly when you add them to the wet mix.
Baking to Perfection
Now, slowly add the dry mixture to the wet mixture. Stir gently with a spatula or wooden spoon. Mix until just combined. Be careful not to overmix; this keeps the blondies soft. Fold in the rainbow sprinkles and white chocolate chips if you want them.
Pour the batter into the lined baking dish. Spread it evenly using a spatula. Top with extra rainbow sprinkles for fun. Bake in the oven for 25-30 minutes. They are ready when the edges turn golden brown. A toothpick should come out clean or with a few moist crumbs. Let them cool for at least 15 minutes, then lift them out using the parchment paper. Cool completely on a wire rack before cutting into squares.
Tips & Tricks
How to Achieve the Best Texture
To get the best texture in your Funfetti blondies, mix your wet and dry items properly. Start with melted butter and sugars for a smooth base. Whisk until it looks shiny. When you add the dry mix, stir gently. Overmixing makes them tough. You want them soft and chewy.
Cooling and Slicing Tips
After baking, let the blondies cool in the pan for 15 minutes. This helps them firm up. Use the parchment paper to lift them out. Once on a wire rack, let them cool fully before slicing. This makes cutting easier. Use a sharp knife for clean edges.
Serving Suggestions for Parties
These blondies are perfect for parties! Serve them on a bright platter. Sprinkle extra rainbow sprinkles on top for fun. You can also drizzle melted white chocolate over them for a sweet touch. Cut them into small squares for easy sharing. Your guests will love the colors and taste!
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Variations
Gluten-Free Options
You can make these blondies gluten-free with just a few swaps. Use gluten-free flour instead of all-purpose flour. Look for a good blend that works for baking. Measure it the same way as regular flour. This change keeps the blondies soft and chewy.
Alternative Flavor Combinations
Want to mix it up? Try adding different flavors. For a chocolate twist, replace some flour with cocoa powder. If you love nuts, add chopped walnuts or pecans. You can also use different types of chips, like dark chocolate or caramel. Each choice makes the blondies unique!
Vegan Modifications
To make these blondies vegan, swap eggs for flax eggs. Mix one tablespoon of ground flaxseed with three tablespoons of water. Let it sit for five minutes to thicken. Use coconut oil instead of butter. Finally, ensure your sprinkles are vegan-friendly. Enjoy a plant-based treat that's still rich and sweet!
Storage Info
Best Practices for Storing Blondies
To keep your Funfetti birthday cake blondies fresh, store them in an airtight container. This helps prevent them from drying out. You can layer the blondies with parchment paper to avoid sticking. Keep them at room temperature for up to three days. If you want them to last longer, consider refrigerating them.
How to Freeze for Later Use
Freezing blondies is simple. First, let them cool completely. Then, cut them into squares. Wrap each square in plastic wrap and place them in a freezer bag. Be sure to squeeze out all the air to avoid freezer burn. These blondies can stay fresh for up to three months in the freezer. When you're ready to enjoy them, just thaw at room temperature.
Shelf Life and Reheating Instructions
In an airtight container at room temperature, blondies last for about three days. If refrigerated, they can last up to a week. To reheat, simply place a blondie in the microwave for about 10-15 seconds. This will warm them up and make them soft again. Enjoy your blondies warm for a delightful treat!
FAQs
Can I make these blondies in advance?
Yes, you can make these blondies ahead of time. They taste great for up to four days when stored properly. Just let them cool completely, then place them in an airtight container. You can also freeze them for up to three months. To thaw, just leave them out at room temperature.
What's the difference between blondies and brownies?
Blondies and brownies are both delicious, but they have key differences. Brownies are made with cocoa or chocolate, giving them a rich, dark flavor. Blondies, on the other hand, use brown sugar and butter for a sweet, buttery taste. Blondies are lighter in color and often have a chewy texture.
Can I use dairy-free butter in this recipe?
Yes, you can use dairy-free butter for these blondies. It works as a great substitute for regular butter. Just be sure to choose a brand that melts well. This way, you can enjoy the same yummy taste without dairy.
You can make Funfetti Birthday Cake Blondies with ease. We covered key ingredients and tasty add-ins. You learned step-by-step instructions for mixing, baking, and cooling. Remember to try different flavor combos and follow storage tips for freshness. With these methods, you’ll impress friends at any party. Enjoy baking and sharing these sweet treats!