INSTRUCTIONS
1. Pat beef dry with paper towels and sprinkle with salt and pepper. Heat 2 teaspoons oil in large skillet over medium-high heat until just smoking. Cook half of beef until browned on all sides, about 8 minutes. Transfer to slow cooker insert and repeat with additional 2 teaspoons oil and remaining beef.
2. Add remaining 2 teaspoons oil, onions, and ¼ teaspoon salt to skillet and cook until onions are lightly browned, about 5 minutes. Add broth, 1 ¼ cups stout, sugar, thyme, chocolate, and bay leaves and bring to boil, using wooden spoon to scrape up browned bits. Transfer to slow cooker insert.
3. Add carrots, parsnips, and potatoes to slow cooker insert. Cover and cook on low until meat is tender, 9 to 10 hours (or cook on high for 6 to 7 hours). Set slow cooker to high. Whisk flour and remaining ¼ cup beer until smooth, then stir mixture into slow cooker. Cook, covered, until sauce thickens, about 15 minutes. Stir in parsley, season with salt and pepper, and discard bay leaf. Serve.
4. Make Ahead: You can prepare the recipe through step 2 the night before the ingredients go into the slow cooker. Refrigerate the browned beef and the onion mixture in separate containers. In the morning, transfer the beef and the onion mixture to the slow cooker and proceed with step 3.
