When I needed to gain weight Mom fixed milk shakes made with cream, ice cream and eggs (no protein powder back then). She also put cream on my cereal, made hot chocolate with cream, etc.

There's a section about nutrition here, you might get good results by posting your question there, too.

Different factors make us what we weigh. Some of it we don't have any control over. Some people just have high metabolic rates that will never allow them to get over a certain weight.

Eat a healthy diet and exercise....this can't do you any harm. Part of it is going to come down to just being happy with the weight you are because that's the way you are supposed to be. Some people have to live with being heavier because that is the way they are supposed to be.

Don't try to gain "bad" weight....you wouldn't want to put on unhealthy fat stores in your arteries or raise your cholesterol.