2/3 c. sugar
1/4 c. cocoa
3 tbsp. cornstarch
1/4 tsp. salt
2 1/4 c. milk
2 tbsp. butter
1 tsp. vanilla

Combine first 4 ingredients in a microwave-proof bowl. Stir in milk. On high power: microwave for 3 minutes, stir; microwave for 2 minutes, stir; microwave for 2 minutes, stir in butter and vanilla. Pour into a cooked pie shell. Top with whip cream when cool. Fast, easy, delicious!