To achieve 20g of fat per serving requires a combination of the serving size to be large and the food to be fat-dense, since it is a high level of fat.
If you're talking about "recommended portion sizes" as stated on the meal packaging/restaurant menu, there are few foods which will give you 20g of fat per serving - even a "small matchbox size piece of cheese" (the recommended portion size) is under 20g of fat.
However, if your referring to portion sizes which people actually eat, foods which are most likely to give you 20g of fat (or possibly more) per serving include: pizzas when there's a large quantity of cheese used, salmon fillets (and other oily fish), the classic fish and chips, ice cream (where, unfortunately, the better the quality the higher in fat it becomes), cake with buttercream/full-fat cream cheese frosting, brioche, laminated pastries (Danishes, Croissants etc...), most things involving puff, hot-water crust or shortcrust pastry, cheesecake, quiche (both the pastry and filling contain huge amounts of fat) and anything where a serving includes 3 or more egg-yolks (think custard or omlettes). A 2-egg cheese omlette will definitely give you 20g or more of fat per omlette (assuming full-fat cheese).
TACOS
Not necessarily. Some fat-free foods contain trace amounts of fat, but it isn't enough to be concerned about (less than .5 grams per serving).
Saturated fat is associated with heart disease. Eating foods high in saturated fat is unhealthy. Foods such as butter, hydrogenated oils and processed meat contain a lot of saturated fat.
Unless you drink pure oil or eat pure lard, there is no food which just IS fat. However nearly all foods contain some fat and some foods contain more than others.
1 cup of semisweet chocolate chips contain 50 g of fat
Yes
That would depend on the size of the crab but 85 grams of crab will contain 2 grams of fat.
Chicken fat is bad because it can contain 100-150 grams of fat.
zero
180
Saturated food is foods that contain fat. Butter, and lard are examples of foods with a large amount of saturated fat.
If you mean what foods contain fats, it's mainly junk food
Of course! 48 grams is a load of booty. You should eat less fat foods like Broccoli and celary! 48 grams of fat is like eating butter.