1Heat oven to 350°F. Mix flour, 3/4 cup of the sugar, 2 tablespoons of the cocoa, 1 tablespoon espresso coffee, the baking powder and salt in medium bowl. Stir in 1/2 cup milk, butter and vanilla until well blended. Spread in ungreased square pan, 9x9x2 inches.
2Mix remaining 1 cup sugar, remaining 2 tablespoons cocoa and 1 teaspoon espresso coffee in small bowl; sprinkle evenly over cake batter. Pour 1 1/2 cups very warm milk over sugar mixture.
3Place sheet of foil or cookie sheet on lower oven rack under cake to catch any spills. Bake cake 35 to 45 minutes or until center is set and firm to the touch. Spoon warm cake into dessert dishes.