1 pkg. (6 oz.) semisweet chocolate chips
1 1/2 c. buttermilk baking mix
1/2 c. chopped nuts, if desired
1/3 c. sugar
1/2 c. milk
2 tbsp. vegetable oil
1 tsp. vanilla
1 egg
1 1/2 c. hot water
2/3 c. sugar

Place 1/3 cup of the chocolate chips in 2 quart microwavable casserole. Microwave on high (100%) just until melted, 1 to 3 minutes. Mix in baking mix, nuts, 1/3 cup sugar, the milk, oil, vanilla and egg with fork; beat vigorously until well blended. Microwave water, 2/3 cup sugar and the remaining chocolate chips in 4 cup microwavable measure on high (100%) 2 minutes; stir. Microwave until mixture boil, 2 to 4 minutes; stir. Carefully pour over mixture in casserole. Microwave uncovered on medium (50%) 9 minutes; rotate casserole 1/4 turn. Microwave on high (100%) until cake is almost dry on top, 5 to 7 minutes. Serve warm with ice cream or whipped cream if desired.