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Slow Cooker Balsamic Glazed Roast Beef

Slow Cooker Balsamic Glazed Roast Beef is a flavorful, fall-apart tender beef roast simmered in a savory-sweet balsamic sauce. Cooked low and slow with onions, garlic, and optional vegetables, it’s an easy comfort food dinner made right in the crockpot.
Prep Time20 minutes
Cook Time10 hours
Total Time10 hours 20 minutes
Servings: 8

Ingredients

  • 1 tablespoon oil
  • 3 pounds beef roast chuck, round, or brisket
  • 1 large onion sliced
  • 4 cloves garlic chopped
  • 1/2 teaspoon red pepper flakes
  • 1 cup beef broth
  • 1/2 cup balsamic vinegar
  • 2 tablespoons soy sauce or tamari
  • 2 tablespoons brown sugar
  • 1 tablespoon Worcestershire sauce
  • 1 pound baby carrots optional
  • 1 pound mini potatoes or diced potatoes optional
  • 2 tablespoons cornstarch + 2 tablespoons water

Instructions

  • Heat oil in a large pan over medium-high heat. Add beef and brown on all sides, about 15–20 minutes total. Remove and set aside.
  • In the same pan, add sliced onions and cook until tender, about 2–3 minutes.
  • Add garlic and red pepper flakes; cook for 1 minute until fragrant.
  • Place browned beef in the slow cooker.
  • Add onions, beef broth, balsamic vinegar, soy sauce, brown sugar, Worcestershire sauce, carrots, and potatoes (if using).
  • Cover and cook on low for 8–10 hours or on high for 3–5 hours, until beef is fork-tender.
  • Remove beef and vegetables from slow cooker. Slice or shred beef.
  • Skim excess fat from cooking liquid and transfer to a saucepan.
  • Bring to a simmer and stir in cornstarch mixed with water. Cook until sauce thickens into a glaze.
  • Spoon balsamic glaze over beef before serving.

Notes

  • Sear the Beef First: Adds deeper flavor.
  • Cook Low and Slow: For the most tender texture.
  • Skim Fat Before Thickening: Keeps sauce smooth.
  • Add Fresh Herbs: Rosemary or thyme pair beautifully.
  • Make Ahead Friendly: Flavors deepen the next day.