INGREDIENTS
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1 1/4 cups all-purpose flour
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1/4 cup granulated sugar
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1/4 teaspoon salt
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1/2 cup (1 stick) cold unsalted butter, cut into small pieces
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3-4 tablespoons heavy cream
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1 egg yolk
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2 cups toasted walnuts, coarsely chopped
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1/2 cup dark chocolate chips
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3/4 cup packed light brown sugar
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1/4 cup dark corn syrup
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1/4 cup (1/2 stick) unsalted butter
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3 tablespoons coffee liqueur