Chocolate Chess Pie

1 (9-inch) pie shell, unbaked
1 1/2 cups granulated sugar
3 tablespoons cocoa
1/4 cup margarine, melted
2 eggs, slightly beaten
1/8 teaspoon salt
1 (5.33 ounce) can evaporated milk
1 teaspoon vanilla extract
1/2 to 3/4 cup chopped pecans (optional)

Prepare unbaked pie shell.

Mix sugar, cocoa and margarine. Stir well. Add eggs and beat with electric mixer for 2 1/2 minutes.

Add salt, milk and vanilla extract. Stir in pecans, if desired. Pour filling into pie shell. Bake at 350 degrees F for 35 to 45 minutes.