Gather the ingredients.

Heat oil in a large skillet over medium heat. Toss beef cubes with flour to coat, then fry in the hot oil until browned.

Place carrots, potatoes, onion, and garlic into a large slow cooker; place browned beef on top of vegetables. Mix beef broth and tomato paste together until combined; pour into the slow cooker along with beer.

Cover and cook on High for 6 hours or Low for 8 hours. During the last hour before serving, dissolve cornstarch in cold water and stir into broth. Simmer on the High setting for a few minutes to thicken. Serve hot.