Step 1

Prepare Pastry Crust. Heat oven to 350°F.

Step 2

Stir together 2/3 cup sugar and cocoa in medium saucepan; stir in water. Cook over medium heat, stirring occasionally, until mixture boils; boil and stir 1 minute. Remove from heat; add butter and 1-1/2 teaspoons vanilla, stirring until butter is melted. Set aside.

Step 3

Stir together flour, remaining 3/4 cup sugar, baking powder and salt in small bowl; add shortening, milk and remaining 1 teaspoon vanilla. Beat on medium speed of electric mixer 2 minutes. Add egg; beat 2 minutes. Spoon batter into prepared crust. Stir chocolate mixture; gently pour over batter. (Do NOT stir. Chocolate layer will sink as pie bakes). Sprinkle nuts over top.

Step 4

Bake 55 to 60 minutes or until wooden pick inserted in cake portion comes out clean. Cool slightly; serve warm with Sweetened Whipped Cream.