"A new favorite. That is all. Yield: 2 and 1/2 dozen..."
INGREDIENTS
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1/2 cup (115g) unsalted butter, softened to room temperature
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3/4 cup (150g) light brown sugar
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1/2 cup (100g) granulated sugar
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1 large egg + 1 egg yolk
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1 teaspoon vanilla extract
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1/2 cup (148g) Nutella, divided*
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2 and 1/2 cups (312g) all-purpose flour
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1 and 1/4 teaspoons baking soda
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1 teaspoon cornstarch
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1/2 teaspoon salt
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1 and 1/4 cups (225g) semi-sweet chocolate chips, divided
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sea salt, to taste