Place 1 graham cracker half on paper towel; top with chocolate bar half and marshmallow. Microwave at MEDIUM (50%) in 10 second intervals until marshmallow puffs. Immediately top with remaining graham cracker half; gently press together. Repeat for each serving; serve immediately. 4 servings.
OUTDOOR S'MORES: Place 1/2 of HERSHEY'S Milk Chocolate Bar (1.55 oz.) on graham cracker half. Carefully toast marshmallow over grill or campfire (supervise the kids if they're doing this); place over chocolate. Top with second graham cracker half; gently press together.