INGREDIENTS
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8 tablespoons (1 stick) butter, melted,
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Plus 8 more tablespoons (1 stick) butter, melted,
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Plus additional butter, for greasing pan
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1 (18.25-ounce) package chocolate cake mix
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1 egg, plus 2 eggs
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1 (8-ounce) package cream cheese, softened
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3 to 4 tablespoons cocoa powder
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1 (16-ounce) box powdered sugar
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1 teaspoon vanilla extract