Ingredients
1 teaspoon salt
2 large eggs
1 1/4 cups granulated sugar
1 cup low-fat buttermilk
1 1/2 cups all-purpose flour
1 teaspoon vanilla extract
1 1/4 teaspoons baking soda
1/2 cup unsweetened cocoa powder
2/3 cup melted butter plus more for pan
Preparation
Preheat oven to 350 degrees. Butter a 9-by-13-inch baking pan. Line bottom with wax or parchment paper; butter paper.
Whisk together dry ingredients in a mixing bowl. Add remaining ingredients; with an electric mixer, beat on low speed until moist. Raise speed to medium; beat until smooth, about 3 minutes more.
Pour into prepared pan; bake until a toothpick inserted in center comes out clean with a few moist crumbs, 25 to 30 minutes. Cool in pan 10 minutes; invert onto a wire rack. Remove paper; reinvert to cool completely. Dust with confectioners’ sugar, if desired.
