What could cause mashed potatoes to stink?

1. Spoiled Potatoes:

* Old Potatoes: Potatoes naturally start to decompose after being harvested. If you use old potatoes, they may have a slightly off taste or smell.

* Damaged Potatoes: Potatoes with bruises, cuts, or green patches (which contain solanine, a toxic compound) can give the mashed potatoes an unpleasant taste and smell.

2. Improper Storage:

* Exposure to Light: Potatoes exposed to light can develop a green tint and a bitter taste, which can also affect the smell of your mashed potatoes.

* Warm Storage: Potatoes stored in warm temperatures can spoil more quickly, developing a sour smell.

3. Bacteria Growth:

* Insufficient Cooking: If the potatoes aren't cooked through, bacteria can survive and multiply, leading to a sour or rotten smell.

* Standing Too Long: Leaving mashed potatoes at room temperature for extended periods allows bacteria to grow, potentially affecting the taste and smell.

* Contamination: If the utensils used for mashing are not clean, or if the potatoes come into contact with contaminated surfaces, bacteria can be introduced.

4. Other Factors:

* Using the Wrong Milk: Sour or spoiled milk will obviously contribute to a bad smell in your mashed potatoes.

* Overuse of Garlic or Onions: While these ingredients add flavor, too much can create an overpowering smell that may not be pleasant for everyone.

Tips to Prevent Stinky Mashed Potatoes:

* Choose fresh, unblemished potatoes.

* Store potatoes in a cool, dark, dry place.

* Cook potatoes thoroughly.

* Use clean utensils and surfaces.

* Serve mashed potatoes immediately or store them in the refrigerator for up to 3 days.

* Don't over-season with strong ingredients.

If your mashed potatoes do have a bad smell, it's best to discard them and start fresh. It's not worth the risk of getting sick.