A basic slow cooker consists of a lidded round or oval cooking pot made of glazed ceramic or porcelain, surrounded by a housing, usually metal, containing an electric heating element. The lid is often of glass seated in a groove in the pot edge; condensed vapour collects in the groove and provides a low-pressure seal to the atmosphere. The contents of a crock pot are effectively at atmospheric pressure, despite the water vapor generated inside the pot. A crock pot is quite different from a pressure cooker and presents no danger of an abrupt pressure release.
The ceramic pot, or 'crock', acts as both a cooking container and a heat reservoir. Slow cookers come in capacities from 500 ml (16 oz) to 7 liters (7.4 US quarts). Due to the placement of heating elements (generally at the bottom and often also partway up the sides), there is usually a minimum recommended liquid level to avoid uncontrolled local heating.
Many slow cookers have two or more heat settings (e.g., low, medium, high, and sometimes a "keep warm" setting); some have continuously variable temperature. A typical slow cooker is designed to heat food to 77 °C (170 °F) on low, to perhaps 88-93 °C (190-200 °F) on high. Many recipes that include sauce or liquid will reach the boiling point around the edges, while food in the center remains gently cooked. This may be because slow cooker settings are based on wattage, not temperature.[4]
Operation
Raw food and a liquid such as water, wine, or stock are placed in the slow cooker. Some recipes call for pre-heated liquid. The cooker lid is put on and the cooker is switched on. Some cookers automatically switch from cooking to warming (maintaining the temperature at 71–74 °C [160–165 °F][5]) after a fixed time or after the internal temperature of the food, as determined by a probe, reaches a specified value.The heating element heats the contents to a steady temperature in the 79–93 °C (175–200 °F) range. The contents are enclosed by the crock and the lid, and attain an essentially constant temperature. The vapor that is produced at this temperature condenses on the lid and returns as liquid. Some water-soluble vitamins are leached into the liquid.[6]
The liquid transfers heat from the pot walls to its contents, and also distributes flavours. A lid is essential to prevent warm vapour from escaping, taking heat with it and cooling the contents.
Basic cookers, which have only high, medium, low, or keep warm settings, have to be manually turned on and off. Others have settings for high and low (e.g., four hours high, eight hours low) which allow the cook to choose a cooking time after which the cooker switches to "keep warm" mode. The most advanced cookers have computerised timing devices that allow the cooker to be programmed to perform multiple operations (e.g., two hours high, followed by two hours low, followed by warm), and to delay the start of cooking.
Because food stays warm for a long time after switching off, slow cookers can be used to cook food to be taken to be eaten elsewhere without reheating. Some cookers have ways of sealing the lid to prevent the contents from spilling during transport.
Recipes
Recipes intended for other cooking methods must be modified for slow cookers. Quantities of liquids may have to be adjusted as there is little evaporation, but there should be enough liquid to cover the food. Many published recipes for slow cookers (aka crock-pots) are designed primarily for convenience and use few ingredients, often prepared sauces. The long, moist cooking is particularly suitable for tough and cheap cuts of meat—for many slow-cooked dishes these cuts give better results than more expensive ones.
Product Description
Amazon.com Product Description
Enjoy healthy, home-cooked meals even with a busy schedule thanks to this easy-to-use programmable 6-quart slow cooker. Simply add ingredients to the unit's oval-shaped stoneware pot, insert the pot into the electric base, and select one of three automatic-cooking options--program, manual, or probe--using the flat-panel push-button control panel with digital display. Especially convenient when away from home, program mode cooks for a specified amount of time, then automatically shifts to keep-warm so food doesn't overcook. Manual mode allows for selecting high or low heat settings--great for cooking the traditional way without setting the time or for heating up previously cooked food. When cooking a large cut of meat or using a recipe that requires food to reach a certain temperature, use the probe mode. The included thermometer probe takes the guesswork out of slow cooking. After reaching the desired internal food temperature, the slow cooker automatically shifts to keep-warm. The thoughtfully designed slow cooker also provides attractive stainless-steel housing, power-interrupt protection, a clip-on spoon, a clip-tight gasket lid, and full-grip handles for safe transport. The removable stoneware and tempered-glass lid clean up easily by hand or in the dishwasher, and a user manual with recipes comes included. Perfect for soups, casseroles, pot roasts, curries, and more, the slow cooker measures approximately 10-2/5 by 16 by 16 inches and carries a one-year limited warranty.
Product Description
Family Size 6 quart oval Programmable slow cooker with flat panel digital read-out and stainless steel base for easy storage and clean-up, plus separate temperature probe for large cuts of meat. No more over cooked or under cooked beef or poultry as the probe reads the internal temperature as it cooks and automatically switches to keep warm once set temperature is reached . Operates in three different cook settings including manual cook mode. Easy to read LED digital control panel and timer for setting preferred cooking time. Other features include a clip-on spoon and a clip-tight gasket lid.
