Marshmallow Squares - Fudge

1/2 cup shortening 3/4 cup sugar 2 eggs 3/4 cup flour 1/4 teaspoon baking powder 1/4 teaspoon salt 2 tablespoons cocoa 1 teaspoon vanilla 1/2 cup chopped nuts[...]

6 ounces semisweet chocolate 1/2 cup peanut butter 1/4 cup butter or 1/4 cup margarine 1 (250 g) package colored miniature marshmallows (about 3 cups or so) 1[...]

2 cups graham wafer crumbs 1/2 cup chopped walnuts 3 unsweetened chocolate squares, melted 1 (300 ml) can eagle brand sweetened condensed milk 1/2 teaspoon[...]