1) Dandan Mian (担担面) is a spicy noodle dish made with peppers, minced meat, garlic and peanuts. The noodles are coated in oily sauce, so it's more like fried noodles or spaghetti than noodle soup. These savoury noodles used to be a ware for street vendors, but they are now a staple of virtually every restaurant that sells Chengdu snacks. There is also a chain of restaurants called Dandan Mian, which specializes in this dish.
2) Hongyou Shuijiao (红油水饺) are jiaozi (Chinese dumplings) served in a sweet and spicy red oil. While jiaozi is traditionally Northern fare, these tasty treats are all Sichuan. The serving size is usually pretty small, just a few dumplings, but it's a necessary and welcome addition to your table of snacks. Hongyou Shuijiao should be available at any Chengdu Snack restaurant.
3) Ye’er Ba (叶儿粑) is what you hear the guy on the bike with a cart mournfully yelling at 1am on the bar streets. It's a steamed snack that is sticky rice on the outside and meat and spices on the inside, and it's wrapped in a leaf. They are certainly one of the most delectable of the street snacks.
4) Liang mian (凉面) are cold noodles. If you are reading this article in a net bar, you can probably see a cold-noodle guy or girl walking around taking orders right now. The guy will take a serving of noodles and mix them with some spicy sauce, vinegar, MSG and whatever else he has on his little cart that you point at. Cheap and fast, just the way we like it.
5) Dou hua (豆花) is a very soft doufu (tofu/beancurd) that is also peddled on the street. When you stop the old man and ask for some douhua, he'll open one big bucket from one side of his bike and put a scoop of fresh, soft dofu into a little plastic bowl. Then he'll open the other big bucket and give you a ladle full of spicy sauce, hopefully the kind with peanuts. You then mix the douhua with a little plastic spoon and enjoy.
6) Nangua Bing and Nangua Qiu (南瓜饼, 南瓜球) are some of my personal favourites. Ten years ago, everyone in Chengdu knew that the place to go for these delicious pumpkin cookies was the bakery right down the street from the Wenshu Temple. However, progress has removed that bakery and changed pumpkin cookies forever. Now, instead of the fat, large cookies that used to be sold, they are almost always bite-sized. And they really vary in quality from place to place. The cookies are like an Oreo, there is a layer of delicious fried and sweetened pumpkin between two sesame cookies. The pumpkin balls are the same delicious fried and sweetened pumpkin, but just rolled in sesame seeds without the cookie. They are way better than anything that the girl scouts sell and I really want a couple jin of them right now. Just go to any of those street bakeries that have a whole bunch of plastic bins, and in one of those bins will be pumpkin cookies and pumpkin balls.
This is just a few of the thousands of Chengdu snacks that are available. If you really want to try all the snacks you can go to Jinli Street, which is the famous Chengdu snack street beside the Wuhou Temple. They have all sorts of appetizing Sichuan treats. You can also go to one of the many snack restaurants in Chengdu and order a “sampler” which will usually be around 100 yuan and will have one of everything on the menu. (Collected by Waifood.com #Gathering the best.)
We had some comprehensive articles on Chengdu snacks and street food
Have a look at these two
Street Food in Chengdu - venturing beyond shaokao
Ready to Eat: market snack attack