Top-ranked recipe named "Chipotle Mayo"
Remove 2 chiles from tin of chipotles in adobo sauce and finely chop; letting some adobo sauce cling to chiles is recommended.
In a bowl, whisk together chiles with oregano, mayo and sour cream.
Cover and refrigerate until chilled, about 1 hour; this lets flavours blend.
Add extra adobo sauce to this if you wish.