The easiest roast beef also happens to be the tastiest! Just season, place in the crockpot, and cook on low all day. This simple roast yields the most heavenly gravy, so be sure to serve it with rice or mashed potatoes.
Sprinkle salt and pepper all over roast and press into sides.
Place roast in crockpot and cook on low for 6 hours or until done to your preference.
Remove roast from crockpot, reserving drippings, and let rest while preparing gravy.
Strain the drippings from the roast into a pan and add ½ cup of the beef broth. Heat over medium heat.
In a jar with a lid, mix flour with about ½ cup beef broth, shaking well to combine.
Slowly add about half of the flour mixture to the drippings over medium heat, whisking constantly.
Continue to heat and whisk as the gravy thickens. If necessary, add more of the flour mixture to thicken or more beef broth to thin.
The roast beef gravy is ready when it is heated through and you are happy with the consistency.
Slice the roast against the grain and serve with gravy.
If you are going to be home, you can also prepare this roast beef in a slow oven (about 300°F) for several hours in a covered cast iron dutch oven. With this method, the gravy can be made in the same pan as the roast.The gravy will thicken more as it cools, and when refrigerated it will gel due to the beef drippings. This is perfectly normal.