"To heighten the toffee flavor, substitute toffee baking bits for half of the chopped almonds...."
INGREDIENTS
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1 cup (2 sticks) unsalted butter, at room temperature
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1 cup firmly packed light brown sugar
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1 large egg yolk
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1 teaspoon vanilla extract
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1/4 teaspoon salt
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2 cups all-purpose flour
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7 to 8 ounces milk chocolate, broken into pieces, or 1 1/2 cups milk chocolate chips
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1 cup chopped almonds, toasted