It sounds like your sweet potatoes may have been infested with mold (thus the dark color), in which case the wisest course of action would be to have discarded them. Question: Recently, perfectly good-looking sweet potatoes when baked and opened seemed to have green areas and in one instance an entirely light green color. Using the microwave to cook sweet potatoes. When I cut them open, I noticed there were white spots and holes. There are a ton of different kinds of sweet potatoes from Beauregard to Regal, but it’s hard to find most of them in the store. Fortunately, as many a farm denizen probably already knows, the white liquid is perfectly safe and harmless- and it won’t affect the taste or cooking properties of your sweet potatoes. (Emphasis mine.) Identify/Knowing/Controlling Registration Log in. Francis said sweet potatoes stored in cool, constant conditions have a shelf life of up to several months. However, in the United States, there are two main varieties of sweet potato: One has a golden skin with creamy white flesh and a crumbly texture. As far as I can tell, it doesn’t hold true for yams, which are an entirely different species altogether. Incidentally, yams and sweet potatoes are different. The only problem is that the microwave cooks the potato unevenly, remaining hard and lumpy in some spots while overly soft and mushy in others. Sweet potatoes come in many different colors. maze Sun, Sep 25 2011, 10:21 am. Note: I am inferring the item in question really is a sweet potato, marketed as a yam. There's no blending, just spots and patches of white everywhere. Holes and white spots in sweet potatoes Forum-> Household Management-> Kosher Kitchen: View latest: 24h 48h 72h. I’ve sliced into sweet potatoes plenty of times, but this afternoon was my the first time I really noticed droplets of white ooze developing in a ring along the inside edge of a cut yam. The flesh is part orange and part white, marbled. Crops; Potato; Fact sheets; Non-parasitic diseases; Internal physiological disorders Types of Sweet Potatoes. Some are the bright orange-fleshed ones we’re used to, but others are pale yellow like the one above. For more information on cultivating and preserving sweet potatoes or other tubers, contact your local county extension agent or visit www.uaex.edu. First, let’s back up. Okay, I get it: Baking a sweet potato in the oven can take 45 minutes to an hour, or a mere 5 minutes in the microwave. Simply put, there is more than one type of sweet potato. Well, the answer is really not that exciting. The skin can be white, yellow, red, purple or brown, and the flesh can be white, yellow, orange or purple. In general, you should be suspicious of any unexpected appearance in your produce. I have a few sweet potatoes I bought a while ago. But we do have a few thoughts: We read often that white sweet potatoes are less sweet and more starchy than their orange counterparts. Everything I’ve read has been “sweet potato, sweet potato, sweet potato.” “Toxicants Occuring Naturally in Foods” mentions that yams don’t make these chemicals when moldy, but they didn’t include a citation for it. Should I throw them out or is it ok to use it? Cut into my orange sweet potato, I always get the same ones, always orange inside, but this one has loads of white in it. All the varieties described below are technically sweet potatoes, though they’re often called yams. Though they’re often called yams answer is really not that exciting ones we’re used to, but others pale! Potatoes or other tubers, contact your local county extension agent or www.uaex.edu! There & # 39 ; s no blending, just spots and patches of white everywhere I bought while. I bought a while ago # 39 ; s no blending, just spots and holes hold! 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