INGREDIENTS
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1 cup butter, melted and cooled
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11/2 cups firmly packed brown sugar
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1/2 cup granulated sugar
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2 large eggs
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2 egg yolks
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1 tablespoon vanilla extract
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31/4 cups all-purpose flour
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1 teaspoon baking soda
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1 teaspoon baking powder
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1 teaspoon salt
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1 (11.5-ounce) bag semisweet chocolate chunks
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1 cup miniature bittersweet chocolate morsels
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Buttercream (recipe follows)
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11/2 cups butter, softened
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8 cups confectionersâ?? sugar
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1/2 cup heavy whipping cream