Of, pertaining to, or having the characteristics of yolk.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "yolky" in a sentence
"There are also some clumps of ‘Sir Winston Churchill’ daffodils behind which are sort of an egg-yolky and cream mixture which should complement the bluebells perfectly."
"An empty egg shelf split the yolky top from the dark underneath."
"Which is actually okay with me as long as the food is the same BUT they have actually stopped doing the over-easy fried egg with the yolky goodness and have now replaced with it with the non-superior version of a sliced egg omellete."