Chocolate Chip Marshmallow Bars

1 cup shortening
3/4 cup granulated sugar
3/4 cup brown sugar
1 teaspoon vanilla
2 large eggs
1 teaspoon vanilla
2 1/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
2 cups miniature marshmallows
1 1/2 cups semisweet chocolate chips
3/4 cup chopped walnuts

In a mixing bowl, cream shortening (do not substitute butter or margarine) and sugars. Add eggs, one at a time, beating well after each addition. Beat in vanilla. Combine flour, baking soda and salt; gradually add to creamed mixture. Stir in marshmallows, chocolate chips and walnuts. Spread in a greased 9 X 13 pan. Bake at 350° for 25-30 minutes or until golden brown. Cool on wire rack. Cut into bars.