BEST SLOW COOKER BEEF POT ROAST
1 (5 pound) bone-in beef pot roast
salt and pepper to taste
1 tablespoon all-purpose flour, or as needed
2 tablespoons vegetable oil
8 ounces sliced mushrooms
1 medium onion, chopped
2 cloves garlic, minced
1 tablespoon butter
1 1/2 tablespoons all-purpose flour
1 tablespoon tomato paste
2 1/2 cups chicken broth
3 medium carrots, cut into chunks
2 stalks celery, cut into chunks
1 sprig fresh rosemary
2 sprigs fresh thyme
Generously season both sides of roast with salt and pepper. Sprinkle flour over the top until well coated, and pat it into the meat. Shake off any excess.
Heat vegetable oil in a large skillet over medium-high heat until hot. Sear the roast on both sides for 5-6 minutes each, until well browned. Remove from the skillet and set aside.
Reduce the heat to medium and stir in mushrooms and butter; cook for 3-4 minutes.
Stir in onion; cook for 5 minutes, until onions are translucent and begin to brown. Add garlic, stir for about a minute.
Stir in 1 1/2 tablespoons flour; cook and stir for about 1 minute. Add tomato paste, and cook for another minute.
Slowly add chicken stock, stir to combine, and return to a simmer. Remove skillet from the heat.
Place carrots and celery in the slow cooker …