Grease a 13"x9" pan. Pour chocolate cake batter into pan, and spread to an even thickness. Bake for 30-35 minutes. Cake should look partially set, with craters of "lava" batter that is not fully ...

Whisk in the flour until smooth. Fold in the chocolate mixture and stir gently until combined. Pour the mixture into a ramekin and bake for 12 to 14 minutes or until the edges are set and puffed.