Hot Fudge Cake

1 cup flour
3/4 cup sugar
6 tbsp baking cocoa
2 tsp baking powder
1/4 tsp salt
1/2 cup milk
2 tbsp vegetable oil
1tsp vanilla
1 cup packed brown sugar
1 3/4 cup hot water
whipped cream or ice cream

In a bowl combine flour, sugar, 2 tablespoons of the cocoa, baking powder and salt. Stir in the milk, oil, and vanilla until smooth. Spread in an ungreased 9-inch square pan. combine brown sugar and remaining cocoa; sprinkle over batter. Pour hot water over all; do not stir. Bake at 350 degrees for 35 -40 minutes. Serve warm.