Gooey Chocolate Chunk Blondies (2024)

Tessa’s Recipe Rundown

Taste: Tons of butterscotch and chocolate flavors.
Texture: Ultra chewy and gooey – the best texture combination ever!
Ease: Ridiculously easy. In 35 minutes, you can have a freshly baked tray of these waiting to cool and enjoy.
Pros: Simple, crowd-pleasing recipe.
Cons: Absolutely none.
Would I make this again? Definitely.

This post may contain affiliate links. Read ourdisclosure policy.

These Gooey Chocolate Chunk Blondies hit all the most delicious notes in one gooey, chewy bite.

It’s quite a simple recipe, but you know I always have to add in some special tweaks and tricks to make it that much better.

After all, the magical Science of Baking is my specialty!

This chewy, gooey Blondie Recipe contains an extra egg yolk for richness and chewiness, dark brown sugar instead of light brown sugar for even more butterscotch flavor, and the addition of a little molasses to really make these as moist and flavorful as possible. I also used half all-purpose flour and half bread flour. Learn more about why this is important just below!

Sprinkle of Science

How to Make Gooey Chocolate Chunk Blondies

Do I Have to Use Bread Flour?

The additional protein content in bread flour brings additional structure and makes these Blondies delightfully chewy. If you don’t have bread flour, feel free to use all-purpose instead (you will need 1 cup or 128 grams of all-purpose flour in total) – just note that your blondies will be less chewy. Be sure to measure your flour accurately – learn more about that here.

Do I Have to Add Molasses?

I love the flavor a little added molasses brings to these Gooey Chocolate Chunk Blondies. It also provides additional moisture for a richly decadent bite. If you don’t have molasses or don’t prefer the flavor, feel free to skip it.

What Type of Chocolate Should I Use For Gooey Chocolate Chunk Blondies?

I used bars of Ghirardelli chocolate chopped into large pieces to take these Gooey Chocolate Chunk Blondies to the next level. They get super melty and delicious and really make a world of difference.
Feel free to use milk chocolate, white chocolate, bittersweet, etc., whatever your preference. Just note that using a sweeter or more bitter chocolate bar will alter the overall sweetness level of the Blondies.
If you can’t find Ghirardelli baking bars, feel free to use any other baking chocolate you like.
Chocolate chips have ingredients added in to help them keep their chip shape, so I recommend taking the time to chop chocolate bars for this recipe for best results.

Flaky Sea Salt: The Perfect Finishing Touch

I love to sprinkle these Gooey Chocolate Chunk Blondies with a little flaky sea salt after they’re done baking for a delightful salty-sweet flavor. If you don’t like that, feel free to skip it.

What’s the Best Pan for Blondies?

I highly recommend using a light-colored metal 8×8-inch pan for these Gooey Chocolate Chunk Blondies. We want to make sure the blondies cook through completely but remain soft and gooey in the center. Avoid glass or ceramic pans as those materials take longer to heat up and cook. This often leads to the center being undercooked by the time the edges start to dry out. Learn more about Glass vs. Metal Pans here.

What if I Don’t Have a Metal Pan?

If you must use glass or ceramic, drop the baking temperature by about 15°F and increase the baking time by 5-10 minutes.

Can I Double This Gooey Chocolate Chunk Blondies Recipe?

Yes! Just double all ingredients and bake it in a 9×13-inch metal baking pan, adding a few minutes to the baking time.

How to Store Gooey Chocolate Chunk Blondies

You can store the blondies for 2 days at room temperature or up to 5 days in the fridge. If storing for more than a day, wait to slice the blondies into bars until you’re ready to serve, to prevent stale edges.

Can I Freeze Gooey Chocolate Chunk Blondies?

You can also freeze these blondies (sliced or as a whole slab) for up to 3 months. Store wrapped in plastic wrap and inside an airtight container. Thaw overnight at room temperature before serving.

More Recipes You’ll Love:

Blondies Recipe
Peanut Butter S’mores Blondies
Chocolate Coconut Blondies
Raspberry Dark Chocolate Blondies
Best Ever Chewy Brownies

Become a Baking Genius!

Join our community!

How to Make

Gooey Chocolate Chunk Blondies

By: Tessa Arias

4.74 from 46 votes

Ingredients

▢ 1 stick (113 grams) unsalted butter, melted
▢ 1 cup (200 grams) dark brown sugar
▢ 1 large egg plus 1 egg yolk
▢ 1 tablespoon molasses, optional
▢ 1 teaspoon vanilla
▢ 1/8 teaspoon fine salt
▢ 1/2 cup (64 grams) all-purpose flour
▢ 1/2 cup (64 grams) bread flour*
▢ 6 ounces (170 grams) semisweet chocolate, chopped into chunks
▢ Flaky sea salt, for sprinkling

Instructions

Preheat the oven to 350°F. Line an 8 by 8-inch light-colored metal pan with foil. Spray with nonstick cooking spray.
In a large bowl, combine the butter and sugar with a rubber spatula. Add the egg, egg yolk, molasses, and vanilla and stir until combined. Stir in the salt and flours. Stir in 3/4 of the chocolate chunks.
Pour the batter into the prepared pan. Sprinkle with the remaining chocolate chunks, pressing into the batter slightly. Bake for 25 minutes, or until set but still gooey. Allow to cool before cutting. Sprinkle with sea salt before serving.

Show us!If you make this recipe, be sure to snap a picture and share it on Instagram with #handletheheat so we can all see!

Recipe Notes

*If you don’t have bread flour, you can use all-purpose flour instead. You will need 1 cup (128 grams) of all-purpose flour in total. Note that skipping the bread flour means that your Blondies won’t be quite as chewy.

Want to bake your version of perfect cookies?

Download our FREE Cookie Customization Chart to make your cookies chewy, crispy, cakey, or however you like them!

Get your freebie

This post was originally published in 2017 and has been updated with additional baking tips. Photos by Sarah Fennel.