Old Fashioned Hot Fudge Cake
["2 (1 oz.) envelopes unsweetened baking chocolate flavor", "1 1/2 c. buttermilk baking mix", "1 c. milk", "2 tsp. vanilla extract", "sugar", "2 Tbsp. cocoa", "whipped cream or ice cream (optional)"]
["About 45 minutes before serving:"]
["chocolate flavor", "buttermilk baking mix", "milk", "vanilla extract", "sugar", "cocoa", "whipped cream"]