Ingredients

1 1/2 cups unbleached all-purpose flour, spooned and leveled

1 cup sugar

3 tablespoons unsweetened cocoa powder

1 teaspoon baking soda

1/2 teaspoon kosher salt

6 tablespoons vegetable oil

1 teaspoon pure vanilla extract

1 tablespoon white vinegar

1 cup cold water

Preparation

Preheat oven to 350 degrees. In an 8-inch square baking pan, whisk together flour, sugar, cocoa powder, baking soda, and salt.

Make a well in center of flour mixture and add oil, vanilla, vinegar, and water. Whisk until well combined. Bake until a toothpick inserted in center comes out clean, 35 to 40 minutes. Let cool completely in pan on a wire rack.