Chocolate Pudding Cake
["1-1/4 c. sugar, divided", "1 c. flour", "7 Tbsp. cocoa, divided", "2 tsp. baking powder", "1/4 tsp. salt", "1/2 c. milk", "1/3 c. butter", "1 egg", "1-1/2 tsp. vanilla", "1/2 c. brown sugar", "1-1/4 C. hot water"]
["Preheat oven to 350 degrees."]
["sugar", "flour", "cocoa", "baking powder", "salt", "milk", "butter", "egg", "vanilla", "brown sugar", "water"]