Available two days only. I personally have not tried them yet, but I really like the quality at this little Portuguese bakery in Hayward.
Once customer said to eat a Malassada before I leave the bakery, because otherwise they are so good, I'll need to return to get some more. Again haven't tried them personally, but they are putting some aside for me.
This place is almost impossible to find Official address is 18563 Mission
Blvd Hayward, CA 94541. Main Phone: 510-278-3322.
It is a little off Mission in a tiny plaza behind Jack in the Box. There's a British pub in the plaza. Very near 238. Take the 14th street exit.
More on Malassadas in link