How To Fix Undercooked Potatoes in Any Dish

Potatoes are a versatile and beloved staple ingredient in many recipes. However, the dreaded problem of undercooked potatoes can happen to even the most seasoned cooks. Whether your potatoes are not fork-tender in a soup or stew, or baked potatoes that are still crunchy in the middle, undercooked spuds can ruin an otherwise delicious dish.

Fortunately, there are solutions for salvaging undercooked potatoes, depending on the cooking method and recipe. With a few quick fixes and helpful tips, you can rescue undercooked potatoes to create fork-tender bites every time. Read on to learn how to fix undercooked potatoes in all types of recipes, from stew to mash.

Reasons Your Potatoes Are Undercooked

Reasons Your Potatoes Are Undercooked

Before diving into solutions, it helps to understand the common causes of undercooked potatoes so you can prevent it in the future. Here are the main reasons your potatoes may turn out underdone:

Reason 1: Not Cooked Long Enough

The simplest explanation is that the potatoes did not cook for a sufficient duration. Different types and cuts of potatoes require varying cook times. Small red or white potatoes may cook through in 15-20 minutes, while large russets can take 45 minutes or longer to reach fork-tender doneness.

For baked or roasted potatoes, extending the cook time is key. Allow large whole potatoes to bake for an hour or more at around 400°F. Roast cubed potatoes and potato wedges for at least 30-40 minutes for crispy, tender insides.

Reason 2: Cooked Unevenly

Another common culprit behind undercooked potatoes is uneven cooking. This happens when potatoes are different sizes, crowded into a too-small pot, or not added to already-boiling water. Here are tips for uniform cooking:

  • Chop potatoes into evenly sized 1-2 inch pieces or wedges.
  • Start potatoes in cold, salted water before bringing to a gentle simmer.
  • Use a pot large enough to accommodate all the potatoes in a single layer.
  • Cook potatoes at a gentle simmer, not a rolling boil.

Reason 3: The Dish Is Too Acidic

Finally, undercooked potatoes can result when a dish contains acidic ingredients like tomatoes, wine, lemon juice, or vinegar. Acids interfere with the breakdown of pectin and cellulose in potatoes’ cell walls, preventing softening during cooking.

How To Fix Undercooked Potatoes In Stew

How To Fix Undercooked Potatoes In Stew

Finding crunchy, raw potatoes in your beef stew or chili is disappointing. Luckily, a few tricks can save undercooked spuds in acidic stews:


  • Sprinkle in a pinch of baking soda. The sodium bicarbonate neutralizes acids and softens potatoes.
  • Simmer the stew longer, checking potatoes every 5-10 minutes until fork-tender.
  • Remove potatoes with a slotted spoon, rinse, then simmer separately if other ingredients are cooked through.
  • Parcook potatoes before adding to stew, or add acidic ingredients like tomatoes later in cooking.

How To Fix Undercooked Potatoes In Soup

Potato soup, chowders, and other creamy soups call for soft, tender potatoes. Undercooked chunks can ruin the texture. Here are ways to revive them:


  • Simmer the soup longer, 10-15 minutes at a time, until potatoes are fork-tender.
  • Stir in a pinch of salt, which helps break down pectin.
  • Remove potatoes with a slotted spoon, rinse, then boil separately if needed.
  • Cut potatoes into smaller, uniform chunks next time for quick, even cooking.
  • Parcook potatoes before adding to the soup.

How To Fix Undercooked Mashed Potatoes

Few things are more disappointing than lumpy, gluey mashed potatoes. Uneven cooking produces pockets of underdone potatoes. To smooth them out:


  • Gently reheat the mashed potatoes with milk, half-and-half or cream over low heat, mashing frequently.
  • Push potatoes through a ricer or metal sieve for a smooth texture.
  • For future mashes, start potatoes in cold water and cut into same-size chunks before boiling.

How To Fix Undercooked Baked Potatoes

Sinking your fork into a still-hard baked potato is a letdown. To finish cooking underdone spuds:


  • Wrap whole potatoes in foil and put back in oven until soft, 10-20 minutes.
  • Microwave pricked potatoes for 2-3 minutes per side.
  • Next time, bake at 300°F for 1-1 1/2 hours for perfect insides.

How To Fix Undercooked Boiled Potatoes

Undercooked boiled potatoes can happen when boiling too rapidly or for insufficient time. To correct underdone boiled potatoes:


  • Simmer potatoes for 10-15 more minutes until fork-tender.
  • Cut underdone potatoes into smaller pieces, return to fresh salted water, and re-boil.
  • Microwave chunks on high for 2-3 minutes for a quick fix.
  • Next time, start potatoes in cold salted water and simmer gently until done.

How To Fix Undercooked Roasted Potatoes

How To Fix Undercooked Roasted Potatoes

Roasted potatoes with crunchy centers can ruin a meal. Here are tricks for salvaging undercooked roasted potatoes:


  • Return potatoes to hot oven and continue roasting during meat’s resting time.
  • Microwave underdone potatoes to finish cooking, though this compromises the crispy exterior.
  • Next time, par-boil potatoes first, flip halfway through roasting, and cut into uniform sizes.

Tips For Fixing Undercooked Potatoes

While the specific techniques differ depending on the cooking method, some universal tips will help you rescue undercooked potatoes:

  • Return undercooked potatoes to heat by microwaving, simmering longer, or baking more, checking frequently for doneness.
  • Cut undercooked potatoes into smaller, more uniform sizes to promote even cooking when re-boiling.
  • Rinse underdone potatoes before returning them to fresh, salted water to boil longer if needed.
  • Add moisture when reheating mashed potatoes, using milk, cream, or broth to improve the texture.
  • Press lumpy mashed potatoes through a ricer or sieve for a smooth, lump-free consistency.

Preventing Undercooked Potatoes

They say that an ounce of prevention is worth a pound of cure. While the above tips will rescue undercooked potatoes, avoiding the problem in the first place is ideal. Here are some guidelines for ensuring fully cooked, fork-tender potatoes every time:

  • Chop potatoes into evenly sized 1-2 inch chunks or wedges for even cooking.
  • Parboil potatoes before roasting or adding to soups and stews.
  • Cook potatoes in wide, shallow pans rather than pots for more even oven cooking.
  • Start potatoes in cold, salted water before bringing to a gentle simmer when boiling.
  • Test doneness early and often with a fork or knife tip – underdone potatoes can cook more, but not overdone ones.
  • Allow more time than you think necessary when baking potatoes – large russets may require 1 1/2 hours or more.


Perfectly cooked potatoes can make or break many recipes and determine whether a dish is delicious or disappointing. By learning strategies for fixing undercooked potatoes in soups, stews, mashes, and roasted dishes, you can salvage the spuds and still achieve fork-tender texture.

Equally important is preventing undercooked potatoes through proper prep like evenly sizing chunks, gentle simmering, and allowing ample cooking times. With the tricks in this article, you can confidently cook potatoes to ideal doneness whether boiling, baking, or beyond. Let us know if you have any other tips for ensuring tender potatoes every time!

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