Cooking With Oregano: Fresh vs. Dried, Timing, Mexican Oregano and Classic Dishes

Oregano is one of the few herbs that cooks often prefer dried. In America’s Test Kitchen’s tests of fresh and dried herbs across 24 recipes, tasters picked fresh almost every time; chili was the one exception, and there dried oregano won.¹ Oregano is a hearty herb that can go in early, it is about three times as strong dried as fresh, and “oregano” can mean two unrelated plants. This page covers how to use it well. For the plant, its chemistry and buying advice, see oregano.

At a glance

Fresh vs. dried oregano

A widely repeated claim says fresh oregano is stronger than dried. The tests point the other way. America’s Test Kitchen found that 1 part dried herb to 3 parts fresh came closest to equal strength, using newly bought jars.¹ The University of Delaware’s extension guide says simply that dried herbs are stronger than fresh.² So 1 teaspoon of dried oregano stands in for about 1 tablespoon of fresh.

Oregano is also one of the herbs that survive drying well. ATK found that dried oregano, rosemary, sage and thyme fared reasonably well in recipes that cooked for more than 20 minutes with plenty of liquid.¹ In chili, its tasters preferred dried oregano to fresh.¹ Fresh oregano still has a place where its leaves stay visible or barely cooked: scattered over pizza or roasted vegetables after cooking, or chopped into a salsa verde (our judgment). For the full comparison, see fresh oregano vs. dried.

How much to use

Oregano is assertive, but not one of the most dominant herbs. The University of Delaware groups it with mint, savory and thyme as a medium-strength herb, to be used in moderate amounts of 1 to 2 teaspoons for 6 servings.² Britannica describes the culinary oreganos as having a strong aroma and a warm, pungent taste.⁵ Start at the low end of Delaware’s range, taste once the dish has simmered, and add more if needed. If a dish has gone over, see too much oregano.

When to add it

Sources disagree on timing. All of this is general herb guidance rather than a test on oregano alone:

A practical reading: dried oregano can go in with the other aromatics in a sauce or chili, where it has time to soften, and fresh oregano does best toward the end. Saveur’s chili con carne, for example, adds oregano with the cumin and flour and cooks them until fragrant.⁷ Taste before serving and top up with a little fresh or crumbled dried oregano if the aroma has faded.

Preparing oregano

• Dried. The University of Delaware suggests crushing dried herbs first to release some of their oils.² Rubbing dried oregano between your palms as it goes into the pot does this.
• Fresh. Strip the leaves from the stems by running your fingers down from the tip, then chop. Older stems are woody and are best left out (our judgment).
• Whole sprigs. A fresh sprig can simmer in beans or a stew and be fished out later (our judgment); Saveur’s Cuban-style black beans call for one sprig of fresh oregano.⁸ Note that oregano is not part of the classic bouquet garni, which Britannica gives as parsley, thyme and a bay leaf.⁹ See bouquet garni.

Mediterranean vs. Mexican oregano

The two herbs sold as oregano come from different plant families:

Both share carvacrol, a phenolic compound.⁶ It is often said that Mexican oregano is the one to use with cumin and chiles, and Mediterranean oregano with tomato sauce and grilled meat. America’s Test Kitchen tried both in tomato sauce and in mojo-marinated skirt steak and noticed minimal differences.⁶ So either works in most dishes; Mexican oregano, being stronger, may need a lighter hand. See Mexican oregano vs. oregano and Mexican oregano.

Where oregano goes: dishes from named recipes

Quantities above are those recipes’ own (Attributed). See also good spices for pizza, Greek seasoning, Italian seasoning, herbes de Provence and chili powder.

Pairings

The blends above show oregano’s usual company: savory, rosemary and thyme in herbes de Provence,¹⁷ cumin and chiles in chili,⁷¹⁶ and garlic in chili powder.¹⁶ Basil, marjoram, garlic, lemon and olive oil are the other classic partners; that part is cooking judgment. Comparisons: marjoram vs. oregano, oregano vs. thyme and basil vs. oregano.

Keeping fresh oregano

In the refrigerator. A common tip is to stand oregano sprigs in a glass of water like flowers. America’s Test Kitchen gives different advice for hearty herbs: they take in moisture through their leaves, so it is important to keep them dry; store them in their original packaging or an open zipper-lock bag in the refrigerator.³

Freezing. South Dakota State University Extension lists oregano among herbs to freeze in ice cubes: fill a tray half full of water with about a tablespoon of herbs in each section.¹⁸ Use the cubes in cooked dishes. See can you freeze oregano?

Drying. The National Center for Home Food Preservation lists oregano among the herbs with a high moisture content, which mold if not dried quickly.¹⁹ See how to dry oregano.

Oregano in oil. Herbs in oil can be a source of Clostridium botulinum, the botulism bacterium, so Oregon State University Extension says the mixture must be refrigerated and used within 4 days, or frozen.²⁰ Do not keep homemade oregano oil at room temperature.

If you have none

Marjoram is the closest stand-in, thyme covers oregano’s sharper side, and Mexican and Mediterranean oregano swap readily (see above). See oregano substitutes and Mexican oregano substitutes.