Answer:
1) Kerry added whey to the pancake batter.
2) In Europe, many cooks and bakers weigh their ingredients to measure them
3) Do you know the way to the new supermarket?
4) Joe is going to make pancakes, he needs to find the way to the supermarket so he can buy his ingredients. He then needs to weight them. Later on he mixes all the ingredients to create a batter, and adds whey.