Italian Balsamic Radicchio Marinade

Steps

1. 1

   Rinse and dry the radicchio

   • Hold the whole radicchio under cold running water and rinse it thoroughly on all sides, rubbing gently with your fingers to remove any dirt or debris trapped between the leaves.
   • Pat it completely dry with paper towels or a clean kitchen towel.
   • Thorough drying is essential—excess moisture will dilute the marinade and make the radicchio too watery.

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   Ready when: Radicchio is rinsed clean and completely dry to the touch

   Tip: Don't skip the drying step—wet radicchio will water down the marinade and result in a bland, diluted flavor

2. 2

   Cut the radicchio into ribbons

   • Place the dried radicchio on a cutting board.
   • Using a chef's knife, cut the head in half lengthwise from top to root.
   • Then cut each half in half again lengthwise, creating four quarters.
   • Keep the root end intact as you work—it holds the leaves together and makes slicing safer and easier.
   • Lay each quarter flat with the cut side down and slice crosswise into ½-inch (1.25 cm) wide ribbons.
   • Transfer the sliced radicchio to a large bowl or plate.
   • You should have about 4 cups of loosely packed ribbons.

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   Ready when: Radicchio is sliced into uniform ½-inch ribbons; you have about 4 cups total

   Tip: Keeping the root end intact while you slice prevents the leaves from falling apart and makes the cutting much faster and safer

3. 3

   Prepare the garlic

   • Peel the 3 garlic cloves by laying them flat on the cutting board and crushing them lightly with the flat of your knife.
   • Discard the papery skin.
   • Mince the cloves finely into small, uniform pieces.
   • Set aside on a small plate or directly in a measuring cup, ready to add to the marinade.

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   Ready when: Garlic is minced into small, even pieces, about ⅛ inch or smaller

   Tip: Mince the garlic finely so it distributes evenly throughout the marinade and flavors all the radicchio as it sits

4. 4

   Whisk the oil and vinegar

   • In a small bowl or measuring cup, pour the ⅓ cup (80 ml) balsamic vinegar and ¼ cup (60 ml) extra virgin olive oil.
   • Whisk them together briskly for about 30 seconds until they emulsify and blend together.
   • The mixture should look slightly thickened and lighter in color than the vinegar alone.

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   Ready when: Vinegar and oil are whisked together and lightly emulsified

   Tip: Vigorous whisking creates a temporary emulsion; the dressing may separate again while marinating, which is completely normal and doesn't affect flavor

5. 5

   Add aromatics and seasonings

   • Pour the minced garlic, 2 fresh thyme sprigs, ½ teaspoon (3 g) kosher salt, ¼ teaspoon (0.5 g) freshly ground black pepper, and a small pinch of red pepper flakes (if using) into the vinegar-oil mixture.
   • Whisk everything together for another 15–20 seconds until well combined.
   • Taste a small spoonful of the marinade.
   • It should taste balanced: sharp and tangy from the vinegar with a rich, smooth undertone from the oil, with garlic and thyme flavor running through.
   • Adjust salt, pepper, or vinegar to taste if needed.

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   Ready when: All seasonings are whisked in and marinade tastes balanced and flavorful

   Tip: Taste the marinade before adding it to the radicchio—once combined, it's harder to adjust seasonings evenly

6. 6

   Combine radicchio and marinade

   • Transfer the sliced radicchio from the plate into a 1-quart (1-liter) glass jar or airtight container.
   • Pour the prepared marinade over the radicchio.
   • Using a spoon or spatula, gently stir and toss the radicchio for about 1 minute to coat all the pieces evenly with the vinegar and oil.
   • Make sure the radicchio is fully submerged or well coated.
   • Cover the jar or container tightly with a lid or plastic wrap.

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   Ready when: All radicchio is coated evenly with marinade and jar is tightly sealed

   Tip: Gentle tossing prevents the radicchio from bruising; vigorous stirring can break delicate leaves and create a mushy texture

7. 7

   Refrigerate and marinate

   • Place the covered jar in the refrigerator.
   • Let the radicchio marinate for at least 1 hour before serving, though overnight (8–12 hours) or up to 2–3 days is ideal for maximum flavor development.
   • Every hour or two, if convenient, gently shake or stir the jar to help distribute the marinade evenly.
   • The radicchio will gradually soften, and the flavors will meld and deepen.

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   Ready when: Radicchio is slightly softened with wilted edges; marinade is absorbed and flavors are melded and balanced

   Tip: The radicchio actually tastes better the next day—the bitter edge mellows and the vinegar flavor becomes more harmonious. It keeps in the refrigerator for up to 2 weeks