a window jamb 12 shown in fig7 and a window pane 14 the molded interior frame window assembly 10 in this preferred embodiment includes four moldings 16 a top horizontal molding 16 a a left vertical molding 16 b a bottom horizontal molding 16 c and a right vertical molding 16 d all of which are identical before installation each molding 16 is most preferably l shaped with a front trim 18 a jamb return 20 a trim return 22 and a cap edging 24 shown in fig2 and 3 each molding 16 has an upper end 26 a lower end 28 and an interior surface 29 in the preferred embodiment the moldings 16 are formed of an acrylic it is most preferable that the moldings 16 comprise of a dr abs acrylic the acrylic can be in a variety of colors each molding 16 is attached to the window jamb 12 and to the wall surface 30 which surrounds the window jamb 12 the window jamb 12 extends from the wall surface 30 to the window pane 14 which is depressed within the wall surface 30 so that the window jamb 12 is perpendicular therebetween the window jamb 12 includes a top horizontal window jamb 12 a a left vertical window jamb 12 b a bottom horizontal window jamb 12 c.