The recommended cooking time for simmering soup in an electric slow cooker typically ranges from 4 to 8 hours on a low setting, or 2 to 4 hours on a high setting. This duration allows the flavors to meld together while the soup gently simmers. The specific time can vary depending on the recipe and the desired consistency of the soup.

The reason for this range in cooking time is due to the nature of electric slow cookers. These appliances maintain a consistent, low temperature, which is ideal for slow cooking and allowing flavors to develop over time. The low setting is generally used for longer cooking times, as it keeps the soup at a lower temperature, which is better for tenderizing meats and allowing the flavors to infuse. Conversely, the high setting cooks the soup faster, which is suitable for recipes that require a quicker cooking process or for those who prefer a slightly thicker soup.

Data from various slow cooker recipes and cooking guides suggest that the low setting is often recommended for soups that contain meats or beans, as these ingredients require more time to become tender. For example, a study published in the Journal of Food Science and Technology found that slow cooking at a low temperature for a longer duration can significantly improve the texture and flavor of beans. Additionally, the National Center for Home Food Preservation advises that slow cookers are particularly useful for tenderizing tough cuts of meat, which is why a longer cooking time on the low setting is often recommended.

In summary, the cooking time for simmering soup in an electric slow cooker can vary from 4 to 8 hours on a low setting or 2 to 4 hours on a high setting. This range is due to the appliance's ability to maintain a consistent, low temperature, which is ideal for slow cooking and flavor development. Recipes that include meats or beans often benefit from the longer cooking time on the low setting, as it allows for better texture and flavor.