Which items are considered pat (bread-like items) with respect to Pat Yisrael?

The minhag (custom) applies to breads, cakes, pies, pretzels and crackers. (In technical terms, it applies to all pat habo bikosnin. (For an in-depth explanation of pat habo bikosnin, see the following article http://oukosher.org/blog/consumer-kosher/the-mezonos-roll-is-it-a-piece-of-cake/)