Brown butter gives these pecan blondies a toasted, nutty aroma, while brown sugar keeps the centers chewy. The key detail is simple: browned butter loses water as it cooks, so this formula adds a measured 2 tablespoons back before the eggs go in. The result is a rich bar with crisp edges and a soft middle, without relying on guesswork about the butter.
What makes these blondies chewy
Blondies are mixed bars rather than a cake batter: melted butter and a generous share of brown sugar make a dense, moist crumb. A small amount of baking powder gives the bars just enough lift, and chopped pecans add crunch without making each bite dry. Browning the butter adds flavor, but it also evaporates some of its water. Restoring 2 tablespoons helps the batter keep the balance this recipe needs.
Ingredients and useful details
Use 226 g (1 cup) unsalted butter, 213 g (1 cup packed) light brown sugar, 100 g (½ cup) granulated sugar, 2 large eggs, 1 tablespoon vanilla, 240 g (2 cups) all-purpose flour, ½ teaspoon baking powder, 5 g (about 1 teaspoon) fine salt, and 110 g (about 1 cup) chopped pecans. You will also need 2 tablespoons water to replace moisture lost while browning the butter. Weighing flour is the most reliable way to avoid a dry, over-packed cup.
How to make brown butter pecan blondies
Heat the oven to 350°F (175°C). Line a 9-by-13-inch metal pan with parchment, leaving a little overhang for lifting. If you want a deeper nut flavor, toast the pecans in a dry skillet over medium-low heat for 3–5 minutes, stirring often; transfer them to a plate as soon as they smell fragrant so they do not keep browning in the hot pan.
Cut the butter into pieces and melt it in a light-colored saucepan over medium heat. Swirl the pan as it foams. When the milk solids at the bottom turn amber and smell nutty, remove it from the heat immediately; the color can deepen quickly from this point. Pour the butter and browned bits into a heatproof mixing bowl to stop the cooking. Carefully whisk in the 2 tablespoons water; it may sizzle. Let the mixture cool until warm rather than hot.
Whisk both sugars into the warm butter until evenly moistened. Add the eggs one at a time, whisking after each, then mix in the vanilla. In a separate bowl, stir together the flour, baking powder, and salt. Fold the dry mixture into the butter mixture just until no dry streaks remain, then fold in the pecans. Stop mixing once the batter comes together; extra mixing can make the bars firm.
Spread the thick batter into the lined pan and smooth the top. Bake for 24–29 minutes. The edges should look set and lightly golden, while the center remains soft but no longer looks wet. A toothpick in the center should come out with a few moist crumbs, not liquid batter. Start checking at 24 minutes, especially if using a dark pan, which can brown the edges faster. Cool in the pan for at least 90 minutes before lifting and cutting into 16 bars; cutting while warm can make the centers seem underdone and crumbly.
Troubleshooting and serving
If the butter smells sharp or the flecks turn dark brown to black, it has gone too far and may taste bitter; start again rather than hiding that flavor with extra sugar. If the finished bars are dry, the most common causes are too much flour or baking them until a toothpick comes out completely clean. For tidy squares, cool fully and wipe the knife between cuts. Serve as they are, or warm a bar briefly and add a scoop of vanilla ice cream.
Store cooled blondies in an airtight container at room temperature for up to 3 days, or freeze well-wrapped squares for up to 2 months for best quality. For another chocolate dessert, try our easy chocolate cake or fudgy chocolate brownies.
Estimated nutrition
Approximate values per bar (1/16 of the pan), calculated from the listed ingredients. Butter brands, pecan size, and how the bars are cut will change the actual amounts.
| Nutrient | Approximate amount |
|---|---|
| Calories | About 300 kcal |
| Carbohydrates | About 32 g |
| Protein | About 3 g |
| Total fat | About 17 g |
| Saturated fat | About 8 g |
| Fiber | About 1 g |
| Total sugars | About 20 g |
| Sodium | About 150 mg |
Nutrition values are estimates for general information and are not medical advice.
Brown Butter Pecan Blondies
Ingredients
Method
- Heat oven to 350°F (175°C). Line a 9-by-13-inch metal pan with parchment, leaving overhang on two sides.
- Melt butter in a light-colored saucepan over medium heat, stirring often. Continue cooking 5 to 8 minutes until the milk solids turn amber and smell nutty. Immediately pour into a heatproof bowl, scraping in the browned bits. Stir in 2 tablespoons water and cool 10 minutes.
- Whisk brown sugar and granulated sugar into the warm butter until no dry pockets remain. Whisk in eggs one at a time, then vanilla.
- In a separate bowl, whisk flour, baking powder, and salt. Fold into the butter mixture just until no dry flour remains; fold in pecans. Do not overmix.
- Spread batter evenly in the prepared pan. Bake 24 to 29 minutes, until edges are set and lightly golden and the center is just set but still soft. A toothpick should show moist crumbs, not wet batter. Avoid waiting for a completely clean toothpick.
- Cool completely in the pan, about 90 minutes, before lifting out and cutting into 16 bars. The center firms as it cools.
