INGREDIENTS
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1 cup (2 sticks) unsalted butter, softened
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3/4 cup sugar
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1 cup light brown sugar, packed
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2 large eggs
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1 1/2 teaspoons vanilla extract
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3 cups all purpose flour
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1 teaspoon baking soda
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1/2 teaspoon baking powder
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1 teaspoon salt
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12 ounces semisweet chocolate, roughly chopped
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1 cup toffee pieces (we used Heath bars)
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Fleur de sel