plain-vanilla

[pleyn-vuh-nil-uh] /ˈpleɪn vəˈnɪl ə/
adjective, Informal.
1.
having no embellishments, extra equipment, elaborate packaging, etc.; plain; simple; down-to-earth:
I want a plain-vanilla car without a lot of chrome trim.
Origin
in allusion to vanilla ice cream, taken to be the most basic flavor
Examples from the web for plain-vanilla
  • Its biggest bets surround the plain-vanilla business of providing technology infrastructure to clients.
  • The public can look past a politician's plain-vanilla affair.
  • Many of our director cases also involve plain-vanilla insider trading or other self-dealing actions by directors.