Fudge without butter dough

2 tablespoons butter or 2 tablespoons margarine 2 cups semi-sweet chocolate chips, divided 1 (14 ounce) can sweetened condensed milk 1 cup all-purpose flour[...]

1 cup margarine or 1 cup butter , softened and divided 4 (1 ounce) unsweetened chocolate squares 2 cups sugar 1 teaspoon vanilla 3 eggs 1 cup all-purpose[...]