INGREDIENTS
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1 cup (2 sticks) unsalted butter
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2 ¼ cup all purpose flour
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1 ¼ teaspoon baking soda
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¼ teaspoon salt
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1 ¼ cup packed dark brown sugar
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¼ cup granulated sugar
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1 egg + 1 yolk, room temperature
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1 ½ teaspoon pure vanilla extract
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1 tablespoon plain Greek yogurt
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¾ cup semisweet chocolate chips
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¼ cup milk chocolate chips
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¼ cup dark chocolate chips
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1 jar Nutella, chilled
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Coarse sea salt, for sprinkling