Chewy Brown Sugar Chocolate Chip Blondies in 30 Minutes Step-by-step instructions

Before you start

Before starting, take the butter out of the refrigerator and let it soften at room temperature for about 30 minutes. Measure all ingredients and have them ready. Line an 8x8-inch baking pan with parchment paper, leaving overhang on two opposite sides.

Chop the dark chocolate into rough chunks if not already done. Preheat the oven to 350°F (175°C) so it's ready when the batter is. This recipe comes together quickly, so having everything prepared ensures a smooth process.

Instructions

Creaming the Butter and Sugars

1. 1Prepare the Batter
   Heat the oven to 350°F (175°C). Line an 8x8-inch baking pan with parchment paper, leaving overhang on two sides for easy lifting. In a large bowl, beat the softened salted butter, dark brown sugar, and granulated sugar with an electric mixer on medium speed until pale, smooth, and glossy, about 2 minutes. Add the egg and vanilla extract, then beat until fully incorporated, scraping down the sides as needed.
   Look for The mixture should look light and fluffy, with no visible streaks of butter or sugar.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Make sure the butter is truly softened to room temperature for a smooth, creamy base.
2. 2Fold in Dry Ingredients
   In a small bowl, whisk together the all-purpose flour and espresso powder. Add the flour mixture to the butter mixture and fold gently with a rubber spatula until just combined. The batter will be thick. Fold in the rough-chopped bittersweet dark chocolate chunks until evenly distributed, being careful not to overmix.
   Look for The batter should be cohesive with no dry streaks, and the chocolate chunks should be evenly dispersed.
   Tip Overmixing can develop gluten and make the blondies tough. Stop as soon as the flour disappears.

The butter mixture should be pale, smooth, and glossy, with no visible sugar granules. It will look like a thick paste. The egg and vanilla should be fully incorporated, and the mixture should hold its shape when lifted with a spatula. This is the foundation for a chewy texture, so take the time to whip it properly.

Baking to Golden Perfection

3. 3Bake the Blondies
   Scrape the batter into the prepared pan and spread it into an even layer. Bake at 350°F (175°C) for 20 minutes, or until the edges are caramelized and shiny and the center is set but still moist. The top should be golden brown, and a toothpick inserted into the center should come out with a few moist crumbs attached.
   Look for The edges will pull away slightly from the pan and look deeply golden; the center will feel firm to the touch.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Rotate the pan halfway through baking for even browning. Start checking at 18 minutes if the oven runs hot.
4. 4Sprinkle with Flaky Salt
   Immediately after removing the blondies from the oven, sprinkle the top with flaky sea salt while the surface is still hot. The salt will stick to the glossy, caramelized top. Let the blondies cool in the pan on a wire rack for at least 15 minutes before slicing.
   Look for The salt crystals should be visible on the surface, adding a savory crunch to every bite.
   Tip Don't skip the salt—it balances the sweetness and enhances the chocolate flavor.

The blondies will puff up slightly and the edges will turn a deep golden brown. The kitchen will smell of caramelized butter and vanilla. The top should be shiny and crackled, and the center should feel firm when pressed gently. A toothpick inserted in the middle will come out with a few moist crumbs, not liquid batter.

Cooling and Slicing

5. 5Slice and Serve
   Using the parchment overhang, lift the entire blondie block out of the pan and onto a cutting board. Use a sharp chef's knife to cut into 9 squares (3 rows by 3 rows). Serve warm for the ultimate chewy texture, or at room temperature. The centers will be moist and tender, with melted chocolate pools throughout.
   Look for The blondies should cut cleanly, revealing a dense, fudgy interior with gooey chocolate chunks.
   Tip For cleaner slices, wipe the knife between cuts. Serve with a glass of cold milk.

After sprinkling with flaky salt, the blondies need to cool in the pan for at least 15 minutes. This allows the center to set without becoming dry. When you lift the parchment, the blondie block should hold together firmly.

Slicing into squares will reveal a moist, dense interior with melted chocolate pockets. The edges will be slightly crisp, and the centers will be tender and chewy.

Common mistakes

One common mistake is overmixing the batter after adding the flour, which develops gluten and results in tough, cakey blondies. Mix until just combined. Another is overbaking—blondies continue to set as they cool, so it's better to pull them out when they look slightly underdone in the center.

Also, don't skip the flaky salt; it's not just a garnish but a key flavor component. Finally, use a metal or glass pan rather than a dark nonstick pan, which can cause over-browning.

How to tell it’s done

The blondies are done when the edges are deeply golden and caramelized, and the center is set but still slightly soft. A toothpick inserted into the center should come out with a few moist crumbs attached, not wet batter. The top will look shiny and crackly.

The internal temperature of the egg-based batter should reach at least 160°F (71°C) to ensure food safety. If the edges look too dark but the center is underdone, reduce the oven temperature by 25°F for the remaining time.

• Egg dishes: 160°F (71°C) in the thickest part