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Soup can stay warm in a slow cooker as long as it is held at 140°F (60°C) or hotter. FoodSafety.gov does not set a fixed maximum number of hours for soup continuously kept at that temperature. Check the soup itself with a food thermometer; a cooker’s “warm” setting alone does not confirm that every portion is hot enough.

What temperature should soup stay at?

Keep cooked soup at 140°F (60°C) or above until it is served. FoodSafety.gov lists a slow cooker as a way to keep food hot and recommends using a food thermometer to check temperature: 4 Steps to Food Safety.

FoodSafety.gov says a slow cooker must remain plugged in to maintain a safe hot temperature. Once the soup is fully cooked, the low or warm setting can maintain that temperature, but verify the soup rather than relying on the setting alone. Stir before checking so you can assess the soup more evenly.

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When does the two-hour limit apply?

The two-hour limit is for perishable food that is not being kept safely hot or cold; it is not a maximum holding time for soup continuously maintained at 140°F (60°C) or above. Refrigerate soup within two hours after cooking or after it leaves safe-temperature holding. If it is exposed to temperatures above 90°F (32°C), refrigerate it within one hour. The unsafe temperature range is between 40°F (4°C) and 140°F (60°C). FoodSafety.gov explains these limits in Prevent Illness from C. perfringens.

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Crock-Pot 7-Quart Manual Slow Cooker, Family Size Serves 8+ People & Fits 6-lb Roast, Removable Stoneware with Warming Setting, Dishwasher Safe for Easy Cleanup, Stainless Steel
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How to cool and refrigerate leftover soup

Do not leave a large pot of soup out to cool slowly. Divide soup into smaller portions and place it in shallow containers so it cools more quickly, then refrigerate it within the applicable time limit. FoodSafety.gov specifically recommends dividing large amounts of soup or stew when cooling leftovers.

How to reheat soup safely

Reheat leftovers to 165°F (74°C); reheat soups to boiling. Do not use a slow cooker to reheat refrigerated soup: it can take too long to pass through the 40°F to 140°F (4°C to 60°C) danger zone. Use a stovetop or microwave to reheat, then transfer the soup to a preheated slow cooker for hot holding if needed. See FoodSafety.gov’s 10 Smart Tips to Keep Your Restaurant Leftovers Safe.

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Ninja® PossibleCooker™ PLUS 6-in-1, 8.5-qt, Black, MC1010
  • REPLACES 12 COOKING TOOLS & APPLIANCES: This cooker replaces the need for a slow cooker, food warmer, nonstick pot, sauté pan, cast iron skillet, saucier, saucepan, stock pot, Dutch oven, roasting pan, bread maker, and utensil
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Instant Pot Duo 6 Qt 7-in-1 Electric Pressure Cooker, Stainless Steel
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Crock-Pot Large 8-Quart Programmable Slow Cooker with Auto Warm Setting Black Stainless Steel
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Crock-Pot 8-Quart Manual Slow Cooker, XL Family Size Serves 10+ People, Removable Stoneware with Warming Setting, Dishwasher Safe for Easy Cleanup, Red
  • Serves 10+ people
  • 8-quart capacity
  • HIGH/LOW cook settings
  • Convenient WARM setting
  • Removable oval stoneware

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