The Muhamad Farid bakery is on the street of the same name, next to St Joseph's Cathedral. The cakes are shown outside on the pavement, so you'll be enticed inside! They are very cheap, and you can take them away to a nearby cafe and sit on the terrace while you order a coffee as an accompaniment. My favourites were the little dried cakes, with sesame or almonds. I didn't really care so much for the honey-filled ones. You can eat one, and you'll be full all day! They also make cream cakes for special occasions. A bag of little cakes for two costs one euro more or less, depending on weight
Nour Al Salam is a small snack area behind Midan Tahrir. There are many like this, where they hang the food out the windows, something not normal for the hygienic standards of Europe, but at least you can see what they offer if you look. I never got sick eating like this in the streets of Cairo. They make good small pizzas that cost 1 Euro, with a lot of pastrami and cheese. Well, the pastrami is chicken, but it looked good. Later there are filled bread with meat that cost 50 cents, very greasy but delicious. They don´t service drinks but you can go to look for one and there is only one table!
This is an Egyptian pastry shop that is located in the city centere (close to the Egyptian Museum), which offers a wide range of butter cookies that have different fillings, in addition to many other cakes and sweets. The cookies are nothing short of sublime, and the price is low. Be prepared to queue, as it's always full. The biscuits are sold on trays, and you can mix and match.