INGREDIENTS
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1 pie crust (either store bought or homemade)
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1 cup semi-sweet chocolate chips, divided
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4 tablespoons unsalted butter
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1/4 cup canola oil
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2 tablespoons unsweetened cocoa powder
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1/2 cup packed brown sugar
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2 eggs
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1 tablespoon vanilla extract
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3/4 teaspoon salt
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1/4 cup all-purpose flour
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1 cup California walnuts toasted and chopped