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What is Radicchio?

Mary McMahon
Updated May 16, 2024
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Radicchio is an Italian salad plant related to chicory. The distinctive plant grows in a rich maroon color with white veins and has a peppery flavor that adds a textural bite to salads. Radicchio is sometimes grilled or roasted, making a pleasant counterpoint to other grilled vegetables. It is growing in popularity and can be found in most produce sections. Radicchio has been in cultivation in the Mediterranean for hundreds of years and is used in a variety of Mediterranean dishes.

Radicchio resembles lettuce most in appearance, although it is not in the lettuce family. It forms tight heads of leaves furled around a central core and grows low to the ground. Radicchio makes a startling splash of color in the garden, and its natural bitterness makes it less subject to depredation by garden pests.

When picking out radicchio in the grocery store, look for larger heads with looser outer leaves. Tight small heads have probably been excessively handled and may have drier cores. Radicchio can keep under refrigeration for one week, and the leaves should be rinsed before use.

To grow radicchio, plant seeds or seedlings in early spring and late fall, because the plant prefers cooler temperatures. It has a shallow root system, and therefore prefers frequent light watering to saturation. Plant radicchio eight to ten inches (20 to 25 centimeters) apart to allow the plants room to form heads. Radicchio will mature in approximately 80 days. Harvest with a sharp knife and remove the roots from the soil before preparing it for the next crop.

For grilling or baking, radicchio leaves can be wrapped whole around other produce items or meats, or prepared separately. If grilling separately, quarter the heads lengthwise, sprinkle them in olive oil and salt for flavor, and grill until the core is tender and the outer leaves brown, which may take approximately 30 minutes with occasional rotations. Sprinkle with asiago or another cheese directly before serving. Grilled radicchio can be made sweeter by mixing it with sweet onion or another caramelizing vegetable.

In salads, be aware that radicchio's bitter flavor is distasteful to some consumers, so it should not be used to excess unless guests are familiar with chicory and other bitter greens. It makes a bright addition to a green salad, standing out with its excellent maroon color and peppery flavor. It does, however, brown easily, and should not be chopped too early.

DelightedCooking is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a DelightedCooking researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments

By Comparables — On Jul 24, 2010

Radicchio, butter lettuce, and a little arugula makes for a tasty alternative to romaine in a Caesar salad. Top this lettuce mix with a few white anchovies, asiago shavings, fresh croutons, and cracked black pepper for a tasty bitter Caesar.

By chicada — On Jul 24, 2010

Grilled radicchio is great on grilled chicken sandwiches. I like to add it to a sandwich stuffed with grilled chicken, tomatoes, mozzarella, and pesto. Put all of these ingredients between two pieces of crusty French bread, brush both sides with olive oil, and throw it on the grill for a few minutes for a delicious treat.

Mary McMahon

Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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