How ong will it take to cook a 27 lb chuuck roast in electric roaster?

It's impossible to give you an exact cooking time for a 27lb chuck roast in an electric roaster without more information.

Here's why:

* Roast size: A 27lb chuck roast is extremely large. This will take much longer than a standard roast.

* Desired doneness: How well do you want the meat cooked? Rare, medium-rare, medium, or well-done?

* Roaster size and wattage: Different roasters have varying capacities and power outputs, which will affect cooking time.

* Type of roaster: Is it a slow cooker or a standard electric roaster? Each has different heat distribution and cooking times.

Here's what I can suggest:

1. Check your roaster's manual: It should have guidelines for cooking large roasts, and it might even have specific information for a chuck roast.

2. Use an online calculator: Many websites offer cooking time calculators for roasts. You can input the weight of the meat and the desired doneness to get a general estimate.

3. Start with a longer time: It's always better to err on the side of caution. You can always check the roast's internal temperature and cook it for a bit longer if needed.

4. Use a meat thermometer: The best way to ensure your chuck roast is cooked to your liking is to use a meat thermometer.

Remember:

* A chuck roast is best cooked low and slow. This will ensure that it is tender and flavorful.

* It's usually recommended to sear the roast before putting it in the roaster for extra flavor.

Good luck with your cooking!