Spring Funfetti Blondies

The first time I made these, my kitchen looked like a celebration had exploded. Rainbow sprinkles were scattered across the counter, my daughter was dancing around with a handful of them, and the buttery smell filling the room made everything feel okay. Sometimes you need a recipe that's pure joy in pan form, no special occasion required.

I brought these to a spring potluck last year, and three different people asked for the recipe before they'd even finished their first square. Something about the cheerful colors and that vanilla butter flavor just pulls people in.

Ingredients

• All-purpose flour: The foundation that gives structure while keeping things tender
• Baking powder: Just enough lift for that perfect slightly puffed center
• Salt: Essential for balancing all that sweetness and making flavors pop
• Unsalted butter: Melted creates that dense chewy texture we love in blondies
• Light brown sugar: Adds moisture and subtle caramel notes that white sugar can't match
• Egg plus yolk: The extra yolk is the secret to fudgy richness
• Pure vanilla extract: Don't skimp here, it's the backbone of the flavor
• White chocolate chips: Optional but they melt into creamy pockets throughout
• Rainbow sprinkles: Use jimmies, not those tiny nonpareils that bleed color everywhere

Instructions

Get your oven ready:

Preheat to 350°F and line an 8x8 pan with parchment paper, leaving those little wings hanging over the sides for easy lifting later.

Whisk the dry team:

Combine flour, baking powder, and salt in a medium bowl, then set it aside while you work on the wet ingredients.

Mix the butter and sugar:

Whisk melted butter and brown sugar until it looks smooth and glossy, about a minute of vigorous stirring.

Add the eggs and vanilla:

Pour in the egg, extra yolk, and vanilla, whisking until everything's incorporated and the mixture turns velvety.

Combine it all:

Gently fold the dry ingredients into the wet with a spatula, stopping as soon as you no longer see dry streaks.

Make it festive:

Fold in white chocolate chips if using, plus most of the sprinkles, saving a tablespoon for that colorful finish on top.

Spread and top:

Even the batter into your prepared pan and scatter those reserved sprinkles over the surface for maximum visual impact.

Bake to perfection:

Bake 23 to 26 minutes until edges are set and a toothpick comes out with those ideal moist crumbs, not completely clean.

Patience pays off:

Let them cool completely in the pan, then lift them out using the parchment paper and cut into 16 squares.

Pin

My friend's daughter called these confetti cake brownies, and honestly, she wasn't wrong. They've become my go-to whenever someone needs a little brightness in their day.

Making Them Extra Special

Brown your butter before mixing it with the sugar, and you'll get these irresistible toffee notes that take the flavor to another level. Just let it cool slightly so you don't accidentally scramble your eggs.

Sprinkle Strategy

Pastel sprinkles give a more sophisticated spring vibe, but the classic rainbow brings maximum cheer. Either way, press a few extra into the top right after baking for that bakery finish.

Storage and Sharing

These stay perfectly soft at room temperature for about three days, though they've never lasted that long in my house. They also freeze beautifully if you want to stash some for emergencies.

• Wrap individual squares in plastic for lunchbox surprises
• Layer between parchment paper in an airtight container for storage
• Freeze for up to three months and thaw at room temperature

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Life's too short for plain blondies when you can have ones that sparkle. Hope these bring some colorful joy to your kitchen.

Recipe Questions & Answers

→ What type of sprinkles work best?

Use jimmies (the long, cylindrical sprinkles) rather than nonpareils (the tiny round balls). Nonpareils can bleed into the batter and create a muddy appearance. Pastel sprinkles give a lovely spring aesthetic, but classic rainbow colors work beautifully too.

→ Can I make these ahead of time?

Yes, these blondies keep well for up to 5 days when stored in an airtight container at room temperature. They actually develop a deeper flavor on day two. You can also freeze them individually wrapped for up to 3 months.

→ Why use both egg and egg yolk?

The extra yolk adds richness and contributes to the chewy, fudgy texture that makes blondies so irresistible. Whole eggs provide structure while the yolk enhances the tender consistency.

→ How do I know when they're done baking?

The edges should look set and slightly golden, while the center may still appear slightly soft. A toothpick inserted in the center should come out with a few moist crumbs but not wet batter. They'll continue to set as they cool.

→ Can I brown the butter?

Absolutely! Browning the butter before mixing adds a wonderful nutty, caramel flavor that pairs beautifully with the vanilla and sprinkles. Just make sure to let it cool slightly before adding the eggs to prevent scrambling.

→ What pan size should I use?

An 8x8-inch (20x20 cm) pan creates perfectly thick, chewy blondies. Using a larger 9x13-inch pan will yield thinner, crispier squares and reduce the baking time to about 18-20 minutes.