Mei Mei Cafe - has a range of food - breakfasts for around 25 Rmb, sandwiches, pizzas and pasta, steaks and local Chinese food. Generally food is made for a western taste, so their spicy is not really that spicy as in Sichuan spicy. However, the food is good and reasonably priced. Very good English spoken with full English menu. There is also a guide book with lots of information about tours and bus times. You can book bus and plane tickets from the cafe as well as tours and treks.
Mekong Cafe - next door to Mei Mei and very similar. We had a pizza there - supposedly spicy beef, but more like chili-con-carne on a biscuit type base - not very good, but probably just unlucky with that order. Again good English spoken. I think popular with expats living in Jinghong.
Forest Cafe - quite a small place but really delicious food. The main reason to come here is to get information and book treks. They have a website - http://www.forest-cafe.org/index.html and Sara is very popular with her treks. Probably best to email her first if you want to book a trek. We had a fried rice, some soup and local beef dish - all really good. Other tables ordered a sandwich - it looked excellent!
All the above places have free maps of Jinghong.
We also went to a local restaurant on the same road as Mei Mei and Mekong. No English name or English menu, but probably some English spoken. Food was ok, but a little oily -prices similar to the other places.
There is a small bakery on Gallannan Lu - I think opposite the hospital. Unlike other towns in Yunnan, there does not seem to be many bakeries!