The O/U has confirmed that all Duncan Hines Cake Mixes and all Duncan Hines Brownie Mixes are always Yoshon.
From Sunrise Kosher: Holy Sushi in Palo Alto, Ca.
Holy Sushi is an authentic Japanese restaurant that is supervised by Sunrise Kosher Hashgacha. They are located at 3441 Alma St. in Palo Alto, Ca.