High Quality Content by WIKIPEDIA articles! Yum-Yum Donuts is a chain of doughnut shops based in California, founded in 1971 by Phillip C. Holland. The original location, at Avenue 26 and Figueroa Street in the Highland Park district of Los Angeles, California is still in operation, but is now one of 70 Yum-Yum Donuts locations set to close. The company also operates the older and larger Winchell`s Donuts chain, which Yum-Yum purchased in 2004. The headquarters for both chains is in the City of Industry, California.