Mix sugar, cocoa and salt in large mug. Heat milk in microwave at HIGH (100%) 1-1/2 minutes or until hot. Gradually add hot milk to cocoa mixture in mug, stirring until well blended. Stir in vanilla. 1 serving. VARIATIONS: Rich and Adult: Increase cocoa to 2 tablespoons; follow recipe above. Lower Fat: Use nonfat milk; follow recipe above. Sugar Free: Omit sugar. Combine cocoa and salt. Proceed as above, using nonfat milk. Stir in vanilla and sugar substitute with sweetening equivalence of 2 tablespoons sugar.