"You can make these cookies ahead: Cool them completely and freeze in an airtight container, with waxed paper between layers, for up to a month. Fill with marshmallow creme just before serving...."
INGREDIENTS
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2 all-purpose flour
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2/3 unsweetened cocoa
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1 baking soda
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1/4 salt
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2 ripe bananas
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1/3 sour cream
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1 vanilla extract
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6 butter or margarine
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1 sugar
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1 egg
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1.33 marshmallow creme