Combine flour, sugar,cocoa, and soda. Stir in butter, milk,and egg. Mix until well blended. Stir in chocolate chips and marshmallows. Divide between 6 buttered custard cups. Space evenly in circle in the Microwave. Cook uncovered at full power for 3 minutes, rotating each one half way through. Let stand for 3 mins before serving. Warm or cold.
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