Chocolate Cake With Fudge Sauce Recipe

In a small saucepan, prepared pudding with milk according to package directions for pudding. Pour into a large bowl; add cake mix and beat until well blended. Spread into a greased 13-in. x 9-in. baking pan. Bake at 350 ° for 30-35 minutes or until cake springs back when lightly touched and edges pull away from sides of pan. Cool on a wire rack. For sauce, in a large heavy saucepan, melt butter and chocolate over low heat. Stir in evaporated milk and sugar until smooth. Bring to a boil over medium heat; cook and stir for 8 minutes or until thickened. Remove from the heat; stir in vanilla. Serve warm sauce with cake. Serve with mint if desired.