F 5'7 and 106lbs - help with gaining weight - smoothies without bananas or protein powder?

I love my protein milkshakes. I use Animal Nutrition brand whey, cake batter, brownie batter, coconut, cinnamon bun, so far no bad ones. I then use Halo protein ice cream (but you can use normal for more calories) and almond milk (again you can use whole) and drink that almost daily. I love it. So nummy and I use it as a meal replacement but I imagine you could use it however you want.

Peanut butter, salmon, butter, avacado, coconut oil, all of those are higher calories and healthier foods. Red meats as well, pork, bacon, sausage. Aim for things more dense in calories but not junk.

Well carbs and proteins are both about 400kcal per 100g. Fats are about 900kcal per 100g. So fats are the best thing to eat to gain weight if youre struggling with fitting enough food in your stomach. calorie dense foods are the foods which have a lot of calories in them but they are small so dont take up so much space in your stomach. Oil is a good example of a calorie dense food. The contrast is things like vegetables, you could eat so much broccoli your stomach is full, but you havent even eaten so many calories. You can bear these things in mind when thinking of what type of foods to eat or what to put in a smoothe. Drinking calories is good if you cant fit enough in from eating. Your diet sounds quite healthy and like you eat a lot of foods which arent so calorie dense.. the wholewheat carbs, fruits and veg.. they are filling you up then you dont feel like you can eat much more. You could eat some things like cream for example as well as your normal healthy diet, to help gain weight. Its not bad to eat unhealthy foods sometimes, just not all the time, things like pizzas, dairy and fatty foods will help you to gain weight. For good whey protein I use one called Impact Whey.

incorporate fast absorbing carbs into each of your meals like white rice. snack on rice cakes with nut butters...
you can also blend oatmeal into your protein smoothies ... also try hummus it is yummy and has lots of good healthy fats

I used to hate protein powders but have discovered one called Impact whey protein which you can get unflavoured. I mix it with chocolate almond milk. I've also switched back to full fat milk and butter!

if you are using whey protein make sure to choose one that is clean (a lot of them can contain contaminants such as metals). The one you said you use "myprotein impact whey" is the one I use (i get unflavoured and just have it with water), if you dont like it I've used Optimum Nutrition chocolate whey protein before too which I thought tasted fine. The reason I like Impact whey is because it is produced to high standards and its clean. Optimum Nutrition is also a brand which passed tests well. Some other brands have been found to be well over the limit in contaminants so I would just make sure you're using a decent one.

It doesn't matter what you eat, it just matters that you weigh and log your food so you know how much you actually ate. It seems like you are fixated on eating "healthy" which isn't bad but there is no reason to limit yourself to these foods.

A calorie is a calorie no matter where it comes from.