INGREDIENTS
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For the base:
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⅓ cup butter, at room temperature
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⅓ cup packed light brown sugar
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2 tablespoons sugar
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1 egg, fridge cold
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1 teaspoon vanilla
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1 cup all-purpose flour
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½ teaspoon baking soda
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¼ teaspoon salt
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1 cup bittersweet-sweet chocolate chips
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For the topping:
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8 ounces cream cheese, at room temperature
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⅓ cup packed light brown sugar
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1 tablespoon cornstarch
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1 egg
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2 tablespoons sour cream
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1 teaspoon vanilla