Hot Fudge Cake

1 cup flour

¾ cup sugar

6 Tbsp. cocoa, divided

2 tsp. baking powder

¼ tsp. salt

½ cup milk

2 Tbsp. oil

1 tsp. vanilla

1 cup brown sugar

1 ¾ cups hot water

Preheat oven to 350.  In a large bowl, stir together flour, sugar, 2 Tbsp. cocoa, baking powder and salt.  In another bowl, whisk together milk, oil and vanilla until blended.  Add to flour mixture; stir with a spoon just until moistened. Pour into an ungreased 9-inch square baking pan.  In a small bowl, mix brown sugar and remaining 4 Tbsp. cocoa; sprinkle over batter.  Pour hot water over all; do not stir. Bake 35-40 minutes.  Serve warm topped with ice cream.