The foods rich in fat are?

Cooking oils, lard[99%], butter, margarine, roasted peanuts[49%], double cream, cheddar cheese, Milk Chocolate[30%]. In decreasing order of fat percentage.

Products made from these foods therefore contain fat as well. Such as cakes, biscuits, pastries. And foods like the fat under chicken skin, fat on bacon.

And you need to look at the different types of fat - some are healthier than others.

Hope this was useful.