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Do I have to blanch my potatoes, to make scalloped potatoes ahead of time?
The short answer I recommend is yes, almost always. If sliced and then placed into a pot of cold water, bring to a boil for 1-2 minutes till the slices have a rubbery consistency, this blanching will help stop the oxidation process. You can then rinse in cold water and store refrigerated till ready to drain and layer at a later time.
If raw, once the potato is cut you can store in the refrigerator, covered with water for 12-24 hours. Be sure to keep submerged in water to prevent slices from turning gray or brown. Add a tablespoon of white wine vinegar or concentrated lemon juice to a gallon of water to help keep the potatoes from turning dark. Drain and layer.
I use a salad spinner to drain the slices and get almost all the excess liquid off each slice.
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Established in 1937, the Idaho Potato Commission (IPC) is a state agency that is responsible for promoting and protecting the famous "Grown in Idaho®" seal, a federally registered trademark that assures consumers they are purchasing genuine, top-quality Idaho® potatoes. Idaho's ideal growing conditions, including rich, volcanic soil, climate and irrigation differentiate Idaho® potatoes from potatoes grown in other states.
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