"These chewy chocolate marshmallow cookies are fun to make and have a gooey marshmallow inside you can see through cracks in the top. So. Good...."
INGREDIENTS
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1/2 cup unsalted butter (softened)
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2/3 cup brown sugar
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1/4 cup granulated sugar
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1 egg (room temperature)
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1 teaspoon vanilla extract
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3/4 teaspoon instant espresso powder
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1 teaspoon baking soda
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3/4 teaspoon salt
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1/2 cup cocoa powder
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1 1/4 cup flour
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10 marshmallows