Best Spices for Green Bean Casserole

Most of green bean casserole’s seasoning comes out of a can. Campbell’s classic adds just black pepper and a teaspoon of soy sauce to a condensed soup that already brings salt, garlic and MSG.¹² That’s why you should taste before you salt, and why a from-scratch version needs its seasoning rebuilt. Want more than the classic? Nutmeg, garlic and thyme are all easy additions.

At a glance

Seasoning	Where it comes from	Job in the dish
Salt	Mostly the soup: 860 mg sodium per 1/2-cup serving²	Seasoning; Campbell’s says to season to taste¹
Monosodium glutamate (MSG)	The soup’s ingredient list²	Savory depth
Dried garlic	The soup’s ingredient list²	Background savoriness
Soy sauce	Added, 1 teaspoon¹	Salt and savory depth
Black pepper	Added, to taste¹	Mild heat
Fried onions	Half mixed in, half on top¹	Crunch and the dish’s main onion flavor
Nutmeg	Optional addition	Warm note that suits creamy dishes
Garlic, onion powder, thyme	Optional additions	More savory and herbal depth

The classic recipe

Campbell’s current version is short: cooked cut green beans in condensed cream of mushroom soup thinned with milk and seasoned with soy sauce, salt and pepper. Half the French fried onions get mixed in and half get scattered on top.¹

The seasonings and what each one does

The soup: salt, garlic and MSG

The condensed soup is the main seasoning. Its label lists, among other things, salt, monosodium glutamate, yeast extract, dried garlic and natural flavoring, with 860 mg of sodium per half-cup serving.² Campbell’s recipe says to season the mixture with salt and pepper, and notes that if you use the unsalted version of the soup, you can add salt to taste.¹ Taste before salting, since the regular soup already has plenty.

The FDA regards added MSG as generally recognized as safe and requires it to be named on ingredient lists as “monosodium glutamate.” The FDA’s summary of an independent scientific review says some sensitive people may get short-term, generally mild symptoms after 3 grams or more of MSG eaten without food.³ See MSG vs. salt and cooking with MSG.

Soy sauce

Besides salt and pepper, the only added seasoning in Campbell’s recipe is a teaspoon of soy sauce.¹

Black pepper

Black pepper is the one spice in Campbell’s recipe. Lots of cooks like it freshly ground, though Campbell’s just says to season with salt and pepper.¹ See cracked vs. ground black pepper.

Onion: fried, on top

The classic gets its onion flavor from canned French fried onions, mixed into the beans and scattered over the top.¹ Campbell’s recipe has no fresh onion, but sautéed yellow onion or a little onion powder in the sauce is a common home tweak.

Garlic

The soup already has dried garlic in it.² If you add fresh garlic, America’s Test Kitchen warns that garlic added too early can burn fast and turn acrid and bitter, so add it once the other aromatics have softened.⁴ See garlic powder vs. garlic.

Nutmeg: the optional warm note

Nutmeg isn’t in the classic recipe. McCormick suggests it for savory dishes like scalloped potatoes, glazed carrots and creamed spinach.⁵ Nutmeg tastes warm and slightly sweet. A small grating into the sauce is plenty; see cooking with nutmeg and too much nutmeg.

Herbs

Want an herbal note? Try thyme, though none of the recipes here uses it. If you add a dried herb, the University of Delaware extension guide’s general rule applies: dried herbs are stronger than fresh, and 3/4 to 1 teaspoon dried equals 2 to 3 teaspoons fresh.⁶

Making it from scratch

Swap the canned soup for a homemade mushroom sauce and you lose the soup’s seasoning with it. The salt, garlic and savory depth on the label² have to come from somewhere else: salt, sautéed garlic and onion, soy sauce, and maybe a pinch of nutmeg. See mushroom spices and good seasonings for green beans.

“Classic Green Bean Casserole”, Campbell’s. campbells.com · Merchant ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰
Campbell’s Condensed Cream of Mushroom Soup, label text via Hannaford product listing. hannaford.com · Merchant ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷
“Questions and Answers on Monosodium glutamate (MSG)”, U.S. Food and Drug Administration. fda.gov · Regulator ↩
Liz Bomze, “Why You Should Wait to Add Garlic”, America’s Test Kitchen, 2023. americastestkitchen.com · Publication ↩
“McCormick Ground Nutmeg”, McCormick. mccormick.com · Merchant ↩
“Using Herbs and Spices”, University of Delaware Cooperative Extension, revised 2025. udel.edu · Reference work ↩

Also drawn on

Nutmeg (Britannica Editors, updated 17 Aug 2026), Encyclopaedia Britannica. britannica.com

Green Bean Casserole Spices: What the 1955 Recipe Uses, and What to Add