Brownie Blondies

Can’t decide between a rich, fudgy brownie and a chewy, buttery blondie? Brownie blondies solve that problem for good. This mashup dessert layers a chocolate chip blondie base with a dark, fudgy brownie top, swirls the two together, and bakes them into one irresistible bar. The result is a treat with pockets of caramel-like blondie flavor running through deep chocolate richness, gooey, fudgy, and packed with melted chocolate in every bite.

Why You’ll Love This Recipe

Why choose between brownies and blondies when you don’t have to? This recipe gives you both in a single bar, guaranteed to satisfy any chocolate or cookie craving. It’s also an easy recipe. Both batters come together with almost the same simple ingredients, and no stand mixer is needed. And if you’re a fan of fudgy brownies, every gooey bite of these bars is made for you.

Ingredient Notes and Substitutions

Cocoa powder. Dark unsweetened cocoa powder gives the richest flavor, but regular cocoa powder works fine as a substitute.

Brown sugar. Light brown sugar is recommended because it gives more distinction between the blondie and brownie layers, though dark brown sugar can be used instead.

Egg. The recipe calls for whole eggs plus an extra egg yolk. What does the extra yolk do? It makes the bars extra chewy.

Chocolate chips. Semi-sweet or dark chocolate chips work best. A high-quality brand gives the best flavor.

Chopped chocolate bar. Chopped chocolate creates a nice visual look in the bars, but regular chocolate chips can be used in its place.

Recipe Instructions

Before starting, line a square 8×8 baking pan with parchment paper and preheat the oven to 350°F (180°C). You’ll need two mixing bowls and a whisk, no stand mixer required.

Step 1: Make the Blondie Batter

In a medium bowl, whisk together light brown sugar, granulated sugar, egg, egg yolk, and vanilla extract until light and fluffy. Then stream in the hot melted butter, whisking constantly until fully combined.

Step 2: Mix in the Dry Ingredients

Fold the all-purpose flour, baking powder, salt, and chopped chocolate into the batter with a rubber spatula until just combined. Spread all but about two-thirds of a cup of this batter evenly into the prepared pan. Set the pan and the reserved batter aside.

Step 3: Make the Brownie Batter

In a separate bowl, whisk together granulated sugar, egg, and vanilla extract until light and fluffy. Melt the chocolate chips and butter together until smooth, then stream this into the batter while whisking constantly. Fold in the flour, cocoa powder, salt, and chopped chocolate until just combined.

Step 4: Layer the Brownie Batter

Spread the brownie batter evenly on top of the blondie layer already in the pan.

Step 5: Layer the Reserved Blondie Batter

Using a spoon or cookie scoop, scoop the reserved blondie batter into tablespoon-size portions and place them on top of the brownie batter.

Step 6: Swirl and Bake

Use a skewer or toothpick to swirl the two batters together. Why not swirl too much? Over-swirling blends the layers and you’ll lose the marbled look. Sprinkle extra chopped chocolate on top, then bake for about 25 minutes, or until a toothpick inserted into the center comes out with the tip smeared in melted chocolate.

Expert Baking Tips

Using a kitchen scale gives far more accurate results than cup measurements, especially for the flour in each batter. Waiting to cut the bars matters too. Cutting them too soon causes them to fall apart when picked up.

Don’t overbake them. The best part of these bars is their gooey, fudgy texture, and a toothpick with a clean finish is a sign they’ve baked too long. What if the toothpick comes out with batter still on it? That means they need more time. The tip should come out smeared with chocolate, not wet with raw batter.

Keep in mind that baking times can vary between ovens, so checking a few minutes early is a good habit, especially the first time making this recipe.

Storage and Freezing

Cooled bars can be stored in an airtight container at room temperature for two to three days, or kept in the pan tightly wrapped in plastic wrap. Want to store them longer? Cut the bars first, then freeze them in an airtight container or freezer bag for up to one month.

FAQs

How do you know brownie blondies are done baking?

 The top of the blondie batter will look golden brown and shiny. A toothpick inserted into the center should come out with the tip smeared in chocolate. Keep in mind the bars will continue to bake slightly even after coming out of the oven.

Can this recipe be made in a 9×13 pan? 

Yes, but a double batch is recommended, otherwise the bars will turn out too thin. They’ll also need extra baking time, so start checking for doneness around the 30-minute mark.

Can gluten-free flour be used?

 This substitution hasn’t been tested with this recipe, so results may vary.

Why do brownie blondies sink in the middle?

 A sunken middle usually means the bars are underbaked. If a toothpick inserted into the center comes out covered in thick batter, they need more time in the oven.

A Dessert Worth the Extra Bowl

Is making two batters instead of one worth the extra effort? Absolutely. The payoff is a bar that genuinely tastes like two desserts in one. For anyone who loves the caramel notes of a blondie as much as the deep chocolate hit of a brownie, this swirled combination is a simple way to stop choosing and just have both.