1/2 cup sugar
3 tbsp. cocoa
1 1/2 tbsp. cornstarch
pinch salt
1/2 cup water, at room temp
2 tbsp. butter
1 tsp. vanilla

Mix together dry ingredients in a 1-quart casserole or 2-cup glass measure. Stir in water.

Cook in microwave on high for 1 1/2 minutes or til mixture boils. Stir halfway through the cooking time. Add butter and stir.

Cook in microwave on high for 30-60 seconds, or until butter has melted and mixture is bubbly. Blend in vanilla. Stir thoroughly.