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

Oregano is one of the few herbs cooks often like better dried. When America’s Test Kitchen tested fresh and dried herbs across 24 recipes, tasters picked fresh almost every time. Chili was the one exception, and there dried oregano won.¹ It’s a hearty herb that can go in early, it’s about three times as strong dried as fresh, and “oregano” can mean two unrelated plants. For the plant, its chemistry and buying advice, see oregano.

At a glance

Fresh vs. dried oregano

You’ll often read that fresh oregano is stronger than dried. The tests say otherwise. 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 just says dried herbs are stronger than fresh.²

Ratio (Computed): 1 teaspoon of dried oregano stands in for about 1 tablespoon of fresh.

Oregano also survives drying well. ATK found that dried oregano, rosemary, sage and thyme held up reasonably well in recipes that cooked for more than 20 minutes with plenty of liquid. In chili, its tasters liked dried oregano better than fresh.¹ Fresh oregano still has its place where the leaves stay visible or barely cooked: scattered over pizza or roasted vegetables after cooking, or chopped into a salsa verde. For the full comparison, see fresh oregano vs. dried.

How much to use

Oregano is assertive, but it isn’t one of the bullies. The culinary oreganos have a strong aroma and a warm, pungent taste.

Ratio (Attributed): The University of Delaware groups it with mint, savory and thyme as a medium-strength herb, to use in moderate amounts of 1 to 2 teaspoons for 6 servings.² Start at the low end of Delaware’s range, taste once the dish has simmered, and add more if it needs it. Went overboard? See too much oregano.

When to add it

The sources disagree on timing. All of this is general herb advice, not a test on oregano alone:

A sensible middle ground: 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.⁶ Taste before serving, and top up with a little fresh or crumbled dried oregano if the smell 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 the job.
• Fresh. Strip the leaves by running your fingers down the stem from the tip, then chop. Older stems are woody, so leave them out.
• Whole sprigs. A fresh sprig can simmer in beans or a stew and get fished out later. Saveur’s Cuban-style black beans call for one sprig of fresh oregano.⁷ Oregano isn’t part of the classic bouquet garni, though: that’s parsley, thyme and a bay leaf. See bouquet garni.

Mediterranean vs. Mexican oregano

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

Both contain carvacrol, a phenolic compound.⁵ The usual advice is Mexican oregano with cumin and chiles, Mediterranean with tomato sauce and grilled meat. America’s Test Kitchen tried both in tomato sauce and in mojo-marinated skirt steak and noticed very little difference.⁵ So either one works in most dishes. Mexican oregano is stronger, so you may want a lighter hand. See Mexican oregano vs. oregano and Mexican oregano.

Where oregano goes: dishes from named recipes

The quantities above come straight from those recipes. See also good spices for pizza, Greek seasoning, Italian seasoning, herbes de Provence and chili powder.

Pairings

Those blends show the company oregano usually keeps: savory, rosemary and thyme in herbes de Provence, cumin and chiles in chili, and garlic in chili powder. Basil, marjoram, garlic, lemon and olive oil are the other classic partners. Comparisons: marjoram vs. oregano, oregano vs. thyme and basil vs. oregano.

Keeping fresh oregano

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

Freezing. South Dakota State University Extension lists oregano among the herbs to freeze in ice cubes: fill a tray half full of water with about a tablespoon of herbs in each section.¹³ Use the cubes in cooked dishes. See can you freeze oregano?

Drying. The National Center for Home Food Preservation lists oregano among the high-moisture herbs that mold if they don’t dry quickly.¹⁴ See how to dry oregano.

Oregano in oil. Herbs in oil can carry Clostridium botulinum, the botulism bacterium, so Oregon State University Extension says the mixture has to be refrigerated and used within 4 days, or frozen.¹⁵ Don’t 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 easily (see above). See oregano substitutes and Mexican oregano substitutes.