Penang is famous for its hawker food. I like going to Padang Brown as the food here are better than Padang Kota. Since it's a hawker-style eatery, you should be prepared to embrace the environment and excitement as well. I recommend you to try their Ais Kacang (shaved ice with rose syrup, condensed milk, cream corn, jellies and red beans). There are 2 ais kacang stalls at Padang Brown. 1 operated by a chinese uncle and another 1 by mamak brothers. Both are equally good. I love the Ais Kacangs in Penang because mostly are finely shaved with no lumps of ice and their red beans are cooked to tender with just the right amount of sweetness (most ais kacang vendors usually use the canned red beans which totally lacks flavour!). Also go for the steamboat at Majid Chelor-Chelor. The unique thing about their steamboat here is that unlike in other states where the steamboat usually comes with the slightly sweet brown teochew bean sauce, their sauces for dipping are peanut sauce and mildly spicy chili sauce which can also be found used for the pasembur (a type of Malaysian  salad consisting of shredded cucumber, boiled and fried potatoes, fried beancurd, shredded turnip,  beansprouts,  prawn fritters and other seafood such as squid and crabs). For thirst quencher, order the Markisa (passion fruit) juice with thinly sliced coconut flesh. Truly refreshing! Enjoy!