Add Recipe URLs to your XML site map.
YooRecipe XMAP Plugin Installation
Please install and enable plg_xmap_com_yoorecipe plugin. Plugin settings should be left untouched. Settings Inheritance is just fine.
Create your XML site map
Go to Components > XMAP and add your site map. Clicking on the XML site map produces a result similar to this one:
Send your site map to Google
If you do not know what you are supposed to do here, Google is your friend!