1 hr 0 min — Medium — American
Dry ingredients go straight into the baking pan — flour, brown sugar, cocoa, baking soda, and salt stir together with a fork, then water, vegetable oil, vinegar, and vanilla pour in and combine without any separate bowls. The vinegar reacts with the baking soda in the oven, creating lift without eggs or dairy. Miniature chocolate chips and a scattering of granulated sugar go over the surface before baking, forming a thin crackled crust. Nine squares, 60 minutes total.