Pudding Puzzle Cake
["2 Tbsp. butter", "1 (1 oz.) sq. unsweetened chocolate", "1 c. all-purpose flour", "3/4 c. sugar", "2 tsp. baking powder", "1/2 c. milk", "1 tsp. vanilla", "1/4 c. light brown sugar, firmly packed", "2 Tbsp. cocoa powder"]
["Heat oven to 325\u00b0.", "Grease six 6-ounce custard cups.", "In saucepan, melt butter and chocolate, stirring until blended and smooth.", "Remove from heat.", "In bowl, combine flour, 1/2 cup sugar and baking powder; stir in milk, vanilla and chocolate mixture. Blend thoroughly.", "Spoon batter into custard cups."]
["butter", "unsweetened chocolate", "flour", "sugar", "baking powder", "milk", "vanilla", "light brown sugar", "cocoa powder"]