INGREDIENTS
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CAKE
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1 & 1/2 teaspoons vanilla
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1 teaspoon espresso powder
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2 sticks salted butter, melted
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1/2 cup dutch-process cocoa powder
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4 eggs, room temperature
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2 cups sugar
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1/4 teaspoon kosher salt
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1 & 1/2 cups unbleached, all-purpose flour
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TOPPING
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1 (10 oz.) bag mini marshmallows
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1/2 stick salted butter
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1/2 cup milk
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1/2 teaspoon espresso powder
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1/2 cup dutch-process cocoa powder
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4 cups powdered sugar
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.