America's Test Kitchen LogoCook's Country LogoCook's Illustrated LogoAmerica's Test Kitchen LogoCook's Country LogoCook's Illustrated Logo

Slow-Cooker Osso Buco

By Lawman Johnson

Published on October 16, 2019

Time

5 to 6 hours on low or 3 to 4 hours on high

Yield

Serves 6

Slow cooker size

5 to 7 quarts

Slow-Cooker Osso Buco

Ingredients

6 (14- to 16-ounce) veal shanks, 1½ inches thick, trimmed and tied around equatorSalt and pepper 6 tablespoons extra-virgin olive oil 2 onions, chopped2 carrots, peeled and sliced ¼ inch thick2 celery ribs, cut into ½-inch pieces3 tablespoons tomato paste ¼ ounce dried porcini mushrooms, rinsed and minced¼ teaspoon red pepper flakes 12 garlic cloves, minced½ cup dry white wine 1½ cups chicken broth 2 tomatoes, cored and chopped2 bay leaves 1 sprig fresh thyme ½ cup minced fresh parsley 1 tablespoon grated lemon zest

Before You Begin

You will need an oval slow cooker for this recipe.

Instructions

  1. 1. Pat shanks dry with paper towels and season with salt and pepper. Heat 2 tablespoons oil in 12-inch skillet over medium-high heat until just smoking. Brown half of shanks on all sides, 8 to 10 minutes; transfer to large plate. Repeat with 2 tablespoons oil and remaining shanks; transfer to plate.
  2. Add remaining 2 tablespoons oil, onions, carrots, celery, and 1 teaspoon salt to fat left in skillet and cook until vegetables are softened, 8 to 10 minutes. Stir in tomato paste, mushrooms, pepper flakes, and half of garlic and cook until fragrant, about 1 minute. Stir in wine, scraping up any browned bits; transfer to slow cooker.
  3. Stir broth, tomatoes, bay leaves, and thyme sprig into slow cooker. Nestle shanks into slow cooker, adding any accumulated juices. Cover and cook until shanks are tender and fork slips easily in and out of meat, 5 to 6 hours on low or 3 to 4 hours on high.
  4. Transfer shanks to serving dish and discard twine. Extract marrow from bones using end of small spoon and reserve. Tent shanks loosely with aluminum foil and let rest while finishing sauce.
  5. Combine parsley, lemon zest, and remaining garlic in bowl. Discard bay leaves and thyme sprig. Process reserved marrow and 1½ cups cooking liquid in blender until smooth, about 30 seconds. Stir marrow mixture and one-quarter of parsley mixture into remaining cooking liquid and season with salt and pepper to taste. Place shanks in individual serving bowls, ladle sauce over top, and sprinkle with remaining parsley mixture. Serve.
Slow-Cooker Osso Buco
Photography by Daniel J. van Ackere. Styling by Marie Piraino.

Slow-Cooker Osso Buco

Save

Time

5 to 6 hours on low or 3 to 4 hours on high

Yield

Serves 6

Slow cooker size

5 to 7 quarts

Ingredients

6 (14- to 16-ounce) veal shanks, 1½ inches thick, trimmed and tied around equator
Salt and pepper
6 tablespoons extra-virgin olive oil
2 onions, chopped
2 carrots, peeled and sliced ¼ inch thick
2 celery ribs, cut into ½-inch pieces
3 tablespoons tomato paste
¼ ounce dried porcini mushrooms, rinsed and minced
¼ teaspoon red pepper flakes
12 garlic cloves, minced
½ cup dry white wine
1½ cups chicken broth
2 tomatoes, cored and chopped
2 bay leaves
1 sprig fresh thyme
½ cup minced fresh parsley
1 tablespoon grated lemon zest

Test Kitchen Techniques

Ingredients

6 (14- to 16-ounce) veal shanks, 1½ inches thick, trimmed and tied around equator
Salt and pepper
6 tablespoons extra-virgin olive oil
2 onions, chopped
2 carrots, peeled and sliced ¼ inch thick
2 celery ribs, cut into ½-inch pieces
3 tablespoons tomato paste
¼ ounce dried porcini mushrooms, rinsed and minced
¼ teaspoon red pepper flakes
12 garlic cloves, minced
½ cup dry white wine
1½ cups chicken broth
2 tomatoes, cored and chopped
2 bay leaves
1 sprig fresh thyme
½ cup minced fresh parsley
1 tablespoon grated lemon zest

Test Kitchen Techniques

Ingredients

6 (14- to 16-ounce) veal shanks, 1½ inches thick, trimmed and tied around equator
Salt and pepper
6 tablespoons extra-virgin olive oil
2 onions, chopped
2 carrots, peeled and sliced ¼ inch thick
2 celery ribs, cut into ½-inch pieces
3 tablespoons tomato paste
¼ ounce dried porcini mushrooms, rinsed and minced
¼ teaspoon red pepper flakes
12 garlic cloves, minced
½ cup dry white wine
1½ cups chicken broth
2 tomatoes, cored and chopped
2 bay leaves
1 sprig fresh thyme
½ cup minced fresh parsley
1 tablespoon grated lemon zest

Test Kitchen Techniques

Why This Recipe Works

This venerable Old World braise extracts incredible flavor from a handful of simple ingredients: veal shanks (which we brown), aromatics (onions, carrots, and celery, all sautéed), and liquids (usually a blend of wine, stock, and tomatoes). Here in the test kitchen we certainly have tackled the traditional version, but now it was time to put the slow cooker to the test and see if we could turn out a version that rivaled it. To provide a savory backbone for the veal shanks we started with the stock. Veal stock is traditional, but few cooks have access to it. We found that chicken broth, along with garlic, onions, carrots, and celery, made a sturdy yet subtle flavor base for our braising liquid. A combination of tomato paste and fresh tomatoes worked perfectly to create plenty of deep tomato flavor. To serve six people, we called for good-size shanks and tied them around the equator to keep the meat attached to the bone. While many recipes suggest flouring the veal before browning it, we got better results by searing the meat seasoned only with salt and pepper. Browning the shanks in two batches prevented overcrowding, while deglazing the pan with wine after softening the aromatics enriched the sauce. At the end of cooking, we processed the marrow from the supertender veal shanks with the braising liquid to give it a lush, thick consistency. Gremolata—a classic component of osso buco comprising a mixture of minced garlic, parsley, and lemon zest—is sometimes used just as a garnish, but often some of it is stirred into the sauce as well. We stirred a quarter of the gremolata right into the braise, and used the remaining to garnish each serving for a final hit of fresh flavor.

Before You Begin

You will need an oval slow cooker for this recipe.

Instructions

  1. 1. Pat shanks dry with paper towels and season with salt and pepper. Heat 2 tablespoons oil in 12-inch skillet over medium-high heat until just smoking. Brown half of shanks on all sides, 8 to 10 minutes; transfer to large plate. Repeat with 2 tablespoons oil and remaining shanks; transfer to plate.
  2. Add remaining 2 tablespoons oil, onions, carrots, celery, and 1 teaspoon salt to fat left in skillet and cook until vegetables are softened, 8 to 10 minutes. Stir in tomato paste, mushrooms, pepper flakes, and half of garlic and cook until fragrant, about 1 minute. Stir in wine, scraping up any browned bits; transfer to slow cooker.
  3. Stir broth, tomatoes, bay leaves, and thyme sprig into slow cooker. Nestle shanks into slow cooker, adding any accumulated juices. Cover and cook until shanks are tender and fork slips easily in and out of meat, 5 to 6 hours on low or 3 to 4 hours on high.
  4. Transfer shanks to serving dish and discard twine. Extract marrow from bones using end of small spoon and reserve. Tent shanks loosely with aluminum foil and let rest while finishing sauce.
  5. Combine parsley, lemon zest, and remaining garlic in bowl. Discard bay leaves and thyme sprig. Process reserved marrow and 1½ cups cooking liquid in blender until smooth, about 30 seconds. Stir marrow mixture and one-quarter of parsley mixture into remaining cooking liquid and season with salt and pepper to taste. Place shanks in individual serving bowls, ladle sauce over top, and sprinkle with remaining parsley mixture. Serve.

Gift This Recipe

Enjoyed this dish? Let others know by sharing it as a gift recipe.

This is a members' feature.