I am decided to start a new blog.Anyone can help us to select the topic. Is adsense pay high for topic related to food and cooking?
Like has been said, the best way for you to decide if it's a good topic is to do the research. Get some keywords and test it out! There are quite a few food-related products on Clickbank so I'm assuming there's a decent amount of money to be made, but you'd have to look into it to see whether it would likely be worth it for you with Adsense.
Doesn't matter how high the keyword is paying, as long as you have a crap ass blog, you won't earn anything. Besides, why do you think you can compete with all the other established blogs with those high paying keywords?