These golden blondies include chopped toffee and browned butter which makes for a sweet and very butterscotchy bar. Browning the butter is a technique that tips these bars to sublime. It’s easy to brown butter: Simply melt and simmer the butter until it turns a deep amber color and has a toasty, nutty aroma. This step takes minutes, so it’s important to keep an eye on the butter while it browns, as it can change quickly from light to dark. It’s a step worth doing, and a wonderful addition to your favorite cookies and bars. You’re welcome.
Brown Butter Toffee Bars
Active Time: 15 minutes
Total Time: 45 minutes
Makes about 25 (1 1/2-inch) bars
1 3/4 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1 cup unsalted butter, melt and brown, cool
1 cup (packed) dark brown sugar
1/2 cup granulated sugar
1 large egg plus 1 egg yolk
1 teaspoon vanilla extract
1 cup chopped toffee bars, about 5 ounces
1/2 cup finely chopped bittersweet chocolate, about 2 ounces
Sea salt for sprinkling, optional
1. Melt the butter in a medium heavy-bodied saucepan over medium heat, whisking frequently. Continue to heat the melted butter until it begins to foam and then subsides, 4 to 5 minutes. Continue to cook until the butter has a deep amber color with a nutty, toasted aroma. (Keep a careful eye on the butter, since it can quickly go from brown to burnt.) When the butter has browned, remove the pan from the heat and pour the butter into a heat-resistant bowl to stop the cooking process. Cool completely. (At this point, you can use the butter as-is, or strain the butter through a cheesecloth or fine-mesh strainer to remove the brown bits. I like to keep the brown bits for extra flavor.)
2. Heat the oven to 350°F. Butter an 8 by 8-inch baking ban and line with parchment.
3. Combine the flour, baking soda, and salt in a small bowl
4. Whisk the sugars, egg, and yolk in a large bowl until light, about 3 minutes. Whisk in the cooled butter and vanilla until smooth. Add the flour and stir to combine. Stir in the toffee and chocolate.
5. Spread the batter in the prepared pan. Sprinkle with sea salt, if using. Transfer to the oven and bake until golden and a toothpick inserted comes clean, about 30 minutes. Cool completely on a rack. Cut into squares.