Hot Fudge Sundae Cake
["1 c. plain flour", "3/4 c. granulated sugar", "2 Tbsp. cocoa", "2 tsp. baking powder", "1/4 tsp. salt", "1/2 c. milk", "2 Tbsp. salad oil", "1 tsp. vanilla", "1 c. chopped nuts (optional)", "1 c. brown sugar, packed", "1/4 c. cocoa", "1 3/4 c. hot tap water", "favorite ice cream"]
["Heat oven to 350\u00b0.", "In ungreased square pan, 9 x 9 x 2-inches, stir together flour, granulated sugar, 2 tablespoons cocoa, the baking powder and salt.", "Mix in milk, oil and vanilla with fork until smooth.", "Stir in nuts.", "Spread evenly in pan.", "Sprinkle with brown sugar and 1/4 cup cocoa.", "Pour hot water over batter.", "Bake 40 minutes.", "Let stand 15 minutes; spoon into dessert dishes or cut into squares.", "Invert each square onto dessert plate.", "Top with ice cream and spoon sauce over each serving."]
["flour", "sugar", "cocoa", "baking powder", "salt", "milk", "salad oil", "vanilla", "nuts", "brown sugar", "cocoa", "water", "favorite ice cream"]