I can't find frozen cranberries anywhere. How can I substitute fresh cranberries for frozen? Do I chop them up and add sugar? Do frozen cranberries have added sugar in them? My cake recipe asks for frozen cranberries.
Frozen cranberries usually do not have added sugar, and are usually frozen whole. So the sneaky solution would be to buy fresh cranberries, freeze them, and then use them however the recipe calls for :)
Since you're not worried about long-term storage, a few hours in the freezer on a baking tray should get them to the correct consistency.
Unless you have reason to think that the baking time has been very much readjusted to compensate for the frozen state of the berries, you can probably use fresh ones in exactly the same way. More likely the recipe assumes you're someplace where the supply of fresh berries is very limited.
I've made the same cake with fresh and frozen other berries, and had no trouble going back and forth according to supply. Well, except the time I went overboard and nearly doubled the amount of frozen berries, but that would probably have been a problem with fresh ones as well.
You can substitute fresh cranberries, but wash and freeze them first.
Freezing fruits breaks down the cellular walls changing the fruit's consistency and the way it interacts with other the ingredients. If a recipe calls for frozen fruit, chances are the results will be quite different if you don't freeze your fresh fruit before using it.