I read some of the older posts about churros being sold in the Fruitvale area, so I went out last night looking for them. After several fruitless rounds on International, Fruitvale, and High streets, I was just about to head home in disappointment when I hit the jackpot! On E. 12th St. between 34th and 35th Ave (right outside the new condos and the mall with Powderface, Lousiana Fried Chicken, etc.), at 6:30pm on a Monday night, there was a woman and her assistant selling churros in a large churro-making cart. (I forgot to ask when they're usually there b/c I was too excited to get my piping hot churros.)
I had to wait 15 minutes in line because she was frying them as we ordered, and the fryer could only fry about 8 at a time. I bought the cajeta filled, cream filled, and a plain. By far, the cajeta was the most delicious. The fresh, hot churro melted the cajeta so that it dripped out in gooey sweetness when you bit into it. It was the best churro I've ever had in the States. The cream was good too, but not as good as cajeta. And the plain, it was too thick in my opinion, since it was designed to work best filled.