Combine cocoa, sugar and water in a heat-resistant, non- metallic pitcher or in individual serving mugs or cups. Heat, uncovered, in Microwave Oven 2 minutes. Stir in milk and heat, uncovered, in Microwave Oven 4 1/2 to 5 1/2 minutes or until hot. Do not allow milk to boil.

From _The New Deluxe Sharp Microwave Oven Cookbook_