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Chicago-Style Giardiniera

By Bryan Roof

Published on March 3, 2025

Time

30 minutes, plus 22 hours refrigerating and brining

Yield

Makes about 1 quart

Chicago-Style Giardiniera

Ingredients

1½ cups chopped cauliflower 1 cup thinly sliced celery ¾ cup chopped red bell pepper ½ cup thinly sliced carrot 2 serrano chiles, stemmed and sliced thin8 garlic cloves, sliced thin1 tablespoon plus 1½ teaspoons table salt, divided1 teaspoon dried oregano 1 teaspoon dried basil ½ teaspoon red pepper flakes, plus extra to taste½ cup pimento-stuffed green olives, sliced thin1½ cups cider vinegar ¾ cup water 2 tablespoons sugar 1–2 cups vegetable oil

Before You Begin

In step 4, this recipe offers a choice of traditional or relish-style (finely chopped) giardiniera. Both styles work well in an Italian beef sandwich; it’s a matter of personal taste. Giardiniera should have a little heat to it. Occasionally, serrano chiles may lean toward the mild side; adjust the heat at the end with additional red pepper flakes to your desired taste. Distilled vinegar or white wine vinegar may be substituted for the cider vinegar.

Instructions

  1. Toss cauliflower, celery, bell pepper, carrot, serranos, garlic, 1 tablespoon salt, oregano, basil, and pepper flakes together in bowl. Cover loosely with plastic wrap and refrigerate for at least 12 hours or up to 24 hours.
  2. Drain and reserve any salting liquid that has accumulated in bottom of vegetable bowl (this will be used later). Stir olives into vegetable mixture, then transfer vegetable mixture to 1-quart jar.
  3. Bring vinegar, water, sugar, and remaining 1½ teaspoons salt to boil in small saucepan over high heat and cook, stirring often, until sugar has dissolved, about 1 minute. Pour brine over vegetables until vegetables are completely covered (you may have extra brine). Let vegetable mixture sit in brine at room temperature for at least 6 hours or refrigerate for up to 24 hours.
  4. Drain pickled vegetables in fine-mesh strainer; discard brine. (If you prefer relish-style giardiniera, transfer pickled vegetables to food processor and pulse until chopped into approximate ¼- to ½-inch pieces, about 6 pulses.) Return vegetables to now-empty 1-quart jar. Add reserved salting liquid to vegetables, then add oil to completely cover pickled vegetables. Cover and refrigerate for at least 4 hours. Season with additional pepper flakes to taste. Serve. (Giardiniera can be refrigerated for up to 2 weeks.)
Chicago-Style Giardiniera
Photography by Steve Klise. Styling by Elle Simone Scott.

Chicago-Style Giardiniera

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Time

30 minutes, plus 22 hours refrigerating and brining

Yield

Makes about 1 quart

Ingredients

1½ cups chopped cauliflower
1 cup thinly sliced celery
¾ cup chopped red bell pepper
½ cup thinly sliced carrot
2 serrano chiles, stemmed and sliced thin
8 garlic cloves, sliced thin
1 tablespoon plus 1½ teaspoons table salt, divided
1 teaspoon dried oregano
1 teaspoon dried basil
½ teaspoon red pepper flakes, plus extra to taste
½ cup pimento-stuffed green olives, sliced thin
1½ cups cider vinegar
¾ cup water
2 tablespoons sugar
1–2 cups vegetable oil

Test Kitchen Techniques

Ingredients

1½ cups chopped cauliflower
1 cup thinly sliced celery
¾ cup chopped red bell pepper
½ cup thinly sliced carrot
2 serrano chiles, stemmed and sliced thin
8 garlic cloves, sliced thin
1 tablespoon plus 1½ teaspoons table salt, divided
1 teaspoon dried oregano
1 teaspoon dried basil
½ teaspoon red pepper flakes, plus extra to taste
½ cup pimento-stuffed green olives, sliced thin
1½ cups cider vinegar
¾ cup water
2 tablespoons sugar
1–2 cups vegetable oil

Test Kitchen Techniques

Ingredients

1½ cups chopped cauliflower
1 cup thinly sliced celery
¾ cup chopped red bell pepper
½ cup thinly sliced carrot
2 serrano chiles, stemmed and sliced thin
8 garlic cloves, sliced thin
1 tablespoon plus 1½ teaspoons table salt, divided
1 teaspoon dried oregano
1 teaspoon dried basil
½ teaspoon red pepper flakes, plus extra to taste
½ cup pimento-stuffed green olives, sliced thin
1½ cups cider vinegar
¾ cup water
2 tablespoons sugar
1–2 cups vegetable oil

Test Kitchen Techniques

Why This Recipe Works

To make Chicago-style giardiniera (the traditional condiment for Chicago Italian Beef Sandwiches), we begin by salting a mix of vegetables—cauliflower, celery, bell peppers, carrots—along with oregano, basil, serrano chiles, and garlic. The salting process seasons the vegetables and leaves them crisp-tender. We then stir in olives, transfer the vegetable mixture to a jar, and pour a hot vinegar-based brine over top. After pickling for 6 to 24 hours, the vegetables are drained, returned to the jar, then covered with vegetable oil (vegetable oil doesn't solidify when chilled in the refrigerator). We allow the giardiniera to sit for at least 4 hours so the flavors can meld, and then season to taste with pepper flakes––it should be slightly spicy––before serving. 

Before You Begin

In step 4, this recipe offers a choice of traditional or relish-style (finely chopped) giardiniera. Both styles work well in an Italian beef sandwich; it’s a matter of personal taste. Giardiniera should have a little heat to it. Occasionally, serrano chiles may lean toward the mild side; adjust the heat at the end with additional red pepper flakes to your desired taste. Distilled vinegar or white wine vinegar may be substituted for the cider vinegar.

Instructions

  1. Toss cauliflower, celery, bell pepper, carrot, serranos, garlic, 1 tablespoon salt, oregano, basil, and pepper flakes together in bowl. Cover loosely with plastic wrap and refrigerate for at least 12 hours or up to 24 hours.
  2. Drain and reserve any salting liquid that has accumulated in bottom of vegetable bowl (this will be used later). Stir olives into vegetable mixture, then transfer vegetable mixture to 1-quart jar.
  3. Bring vinegar, water, sugar, and remaining 1½ teaspoons salt to boil in small saucepan over high heat and cook, stirring often, until sugar has dissolved, about 1 minute. Pour brine over vegetables until vegetables are completely covered (you may have extra brine). Let vegetable mixture sit in brine at room temperature for at least 6 hours or refrigerate for up to 24 hours.
  4. Drain pickled vegetables in fine-mesh strainer; discard brine. (If you prefer relish-style giardiniera, transfer pickled vegetables to food processor and pulse until chopped into approximate ¼- to ½-inch pieces, about 6 pulses.) Return vegetables to now-empty 1-quart jar. Add reserved salting liquid to vegetables, then add oil to completely cover pickled vegetables. Cover and refrigerate for at least 4 hours. Season with additional pepper flakes to taste. Serve. (Giardiniera can be refrigerated for up to 2 weeks.)

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