from Tkinter import *    
root    = Tk()
mbutton = Menubutton(root, text='Food')     # the pull-down stands alone
picks   = Menu(mbutton)               
mbutton.config(menu=picks)           
picks.add_command(label='spam',  command=root.quit)
picks.add_command(label='eggs',  command=root.quit)
picks.add_command(label='bacon', command=root.quit)
mbutton.pack()
mbutton.config(bg='white', bd=4, relief=RAISED)
root.mainloop()