When cooking a beef casserole in a slow cooker on the "high" setting, the cooking time will generally range from 4 to 6 hours. Slow cookers are designed to cook food at a lower temperature than traditional stovetops or ovens, which is why the cooking times are longer.
The actual cooking time will depend on various factors, including the size and cut of the beef, the temperature of your slow cooker, and the specific recipe you are using. Tougher cuts of beef, such as chuck or brisket, benefit from longer cooking times to become tender and flavorful.
Here's a general guideline for cooking beef casserole in a slow cooker on high:
Cubed Beef: If you have cubed the beef for your casserole, it will generally take around 4 to 5 hours on high for the meat to become tender and the flavors to meld.
Whole Roast: If you are using a larger piece of beef, like a pot roast, it may take closer to 5 to 6 hours on high to achieve the desired tenderness.
To ensure that your beef casserole is cooked properly and safely, it's essential to use a food thermometer to check that the internal temperature of the beef reaches at least 145°F (63°C) for medium-rare doneness or higher if you prefer well-done meat.
Additionally, it's a good idea to follow a specific beef casserole recipe that provides cooking times and temperature recommendations for your slow cooker model. Each slow cooker can vary slightly in performance, so following a recipe can help you achieve the best results.