Just took a loaf out of the oven, mine uses milk and oil. A cup of milk and 1/4 cup oil. Banana bread is pretty forgiving, you could even use water and oil.
Choose a recipe that includes Sour Cream or Yogurt, and you will get a nice moist pound cake, banana bread, etc.
Yogurt.
No, they are too different.
If a recipe is calling for a brand name of a very basic ingredient, they are trying to sell that product. Sour cream is sour cream.
You can use Sour Cream of Mayonnaise as a substitute of yogurt.
Yes
Sour cream represents a fat component, so you can use butter, margarine, vegetable oil.
Greek yogurt!
Mayo
you wont get the same taste from using double cream instead of sour cream and the consistency might be a bit off.
You could, but it would make you bread kinda of cold. Theres no or yes answer.
No, sour cream is not an acceptable substitue for eggs in any recipe. They have different properties and different purposes.