Brownie Pudding
["2 c. flour", "2 1/4 c. sugar, divided", "4 tsp. baking powder", "7 Tbsp. cocoa powder, divided", "1/4 tsp. salt", "1 c. milk", "1/4 c. oil", "2 tsp. vanilla extract", "1 c. chopped nuts", "3 c. hot water", "whipped cream or ice cream"]
["Preheat oven to 350\u00b0.", "Grease or spray with nonstick coating a baking dish, 13 x 9-inch."]
["flour", "sugar", "baking powder", "cocoa powder", "salt", "milk", "oil", "vanilla extract", "nuts", "water", "whipped cream"]