Name: Homemade Onion Soup Mix
Prep time: 10 min
Total time: 10 min
Yield: 1
Ingredients: 1/2 cup dried minced onion; 1/4 cup beef bouillon powder; 2 tablespoons onion powder; 1 tablespoon cornstarch; 1 teaspoon celery seed; 1/2 teaspoon black pepper

Last updated: September 27, 2026

This onion soup mix recipe turns five ingredients you likely already own into a blend that outperforms the little envelopes at the store. You get all the savory, oniony depth without the anti caking agents or the mystery sodium levels, and the recipe card below has the exact measurements ready to go.

A white bowl filled with a dried onion soup mix sits on a wooden kitchen counter, surrounded by a jar of mix, a wooden spoon, a whisk, and small bowls of spices. Sunlight streams in from a nearby window.

Why Make Your Own Onion Soup Mix

Store bought onion soup mix relies on dehydrated onion, cornstarch, and a heavy dose of salt to get its signature flavor. When you make your own onion soup mix recipe at home, you control every one of those variables.

A glass jar filled with dried minced onions sits on a wooden surface next to a metal whisk and a blue cloth. Onion flakes are scattered around the jar.

You can dial the salt back for a family member watching sodium, or bump up the onion for a deeper flavor in your next pot roast. The blend also skips the caramel color and hydrolyzed proteins that many packaged versions use to fake that deep brown broth taste.

Once you taste the difference in a batch of French onion dip, you probably will not go back to the paper packet. It also means you always have a jar ready, even on a Sunday night when the grocery store is closed.

Large white bowl with dried minced onions, garlic powder, flour, and black pepper. Surrounding it are small bowls of spices, a wooden spoon, a whisk, and a jar of dried onions on a wooden surface.

The Ingredients You Need

The base of this onion soup mix recipe is dried minced onion, which gives you the texture and bite that fresh onion cannot provide in a shelf stable blend. Beef bouillon powder brings the savory backbone that makes this taste like the classic packet your grandmother used.

A glass jar filled with a homemade oat mixture sits on a wooden board. A small wooden spoon rests in the jar. A blue cloth, mixing bowl, and ingredients are in the background on a sunlit kitchen counter.

Onion powder rounds out the onion flavor in a way that dissolves smoothly into liquid, while a touch of celery seed adds a slightly herbal note that keeps the mix from tasting one dimensional. A little cornstarch acts as a light thickener when the mix goes into a soup or gravy, and black pepper adds a gentle background heat.

Look for dried minced onion in the spice aisle, often labeled onion flakes. Beef bouillon powder can be found near the broths and stocks, and any brand works fine as long as it is a powder rather than large cubes.

A jar of dried seasoning sits on a wooden table, surrounded by a wooden spoon, blue cloth, small bowls of spices, a mixing bowl with a whisk, and chopped onions on a cutting board.

How to Mix It Together

Making this onion soup mix recipe could not be simpler, since there is no cooking involved at all. You simply measure every dry ingredient into a bowl and whisk them together until the color and texture look uniform throughout.

Hands whisking a mixture of dried herbs and onions in a white bowl on a wooden surface, surrounded by small bowls of spices, a jar, a wooden spoon, and a blue towel.

A small whisk breaks up any clumps in the dried onion flakes better than a spoon does, so take an extra thirty seconds here. Once the mix looks evenly combined, transfer it into an airtight jar or a resealable bag for storage.

Label the container with the date you made it and the recipe yield, since this makes it easy to measure out for future recipes. One batch typically replaces about four store bought packets, so a permanent marker on the jar saves guesswork later.

A person pours a homemade dry soup mix from a white bowl into a glass jar on a kitchen counter, with herbs and utensils nearby.

How to Use Homemade Onion Soup Mix

Two tablespoons of this onion soup mix recipe replaces one standard 1 ounce store bought packet in almost any recipe that calls for one. Stir it into sour cream or Greek yogurt for a five minute French onion dip that disappears at every party.

A steaming mug of French onion soup topped with melted cheese and herbs sits on a wooden counter beside a blue cloth, with a small potted plant in the background.

You can also sprinkle it directly over a chuck roast before it goes into the slow cooker, where it dissolves into the pan juices as the meat cooks low and slow. It works beautifully whisked into a pot of green bean casserole sauce or stirred into ground beef for a quick onion flavored burger patty.

For a fast soup, whisk two to three tablespoons into four cups of hot water or broth and simmer for ten minutes to let the flavors bloom. Taste before adding extra salt, since the bouillon powder already carries a good amount.

A bowl of creamy onion dip topped with crispy onions sits on a table with potato chips, a wooden spoon, a whisk, a jar of crispy onions, a small bowl of pepper, salt, and a sliced onion on a cutting board.

Storage and Shelf Life

This onion soup mix recipe keeps well because every ingredient in it is already shelf stable and low in moisture. Store the finished mix in an airtight container in a cool, dark pantry, away from heat sources like the stove or a sunny window.

Kept this way, the mix stays at its best for about six months, though it remains safe to use beyond that as long as it still smells fragrant and has not clumped from moisture. If you notice the mix hardening into a solid block, moisture has gotten in and it is time to make a fresh batch.

Glass jars filled with dried foods and spices, such as dried onion, black peppercorns, and herbs, are neatly arranged on a wooden kitchen shelf in front of a white tiled wall.

Avoid storing it in the refrigerator, since the humidity in a fridge encourages clumping in dry spice blends like this one. A small mason jar with a tight lid does the job perfectly and looks nice sitting on an open shelf too.

Variations to Try

If you like a smokier onion soup mix recipe, stir in a quarter teaspoon of smoked paprika along with the other dry ingredients. For a version with more depth, swap half the dried minced onion for dried minced shallot, which brings a slightly sweeter, more delicate onion note.

Vegetarian cooks can swap the beef bouillon powder for a vegetable bouillon powder of the same texture without changing any other measurement. If you want a lower sodium version, use a reduced sodium bouillon powder and taste test the dip or soup before adding any extra salt at the table.

A glass cup tipped over on a wooden cutting board, spilling dried onion flakes. Nearby are small bowls, a wooden spoon, a jar of flakes, and a mixing bowl, with a blue cloth and herbs in the background.

Garlic lovers can add a half teaspoon of garlic powder for a rounder, more savory finish that pairs especially well in the burger and meatloaf uses. Each of these variations keeps the same simple stir together method described above.

Ready to put this together? The recipe card below has the exact quantities and step by step instructions so you can measure with confidence.

1 batch (about 4 packets)

Homemade Onion Soup Mix

Prep Time: 10 minutes

Total Time: 10 minutes

A five ingredient homemade onion soup mix that replaces store bought packets in dips, casseroles, soups, and roasts.

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Ingredients

1/2 cup dried minced onion
1/4 cup beef bouillon powder
2 tablespoons onion powder
1 tablespoon cornstarch
1 teaspoon celery seed
1/2 teaspoon black pepper

Instructions

Add the dried minced onion, beef bouillon powder, onion powder, cornstarch, celery seed, and black pepper to a mixing bowl.
Whisk the ingredients together until evenly combined and no clumps remain.
Transfer the mix to an airtight jar or resealable bag.
Label the container with the date and store in a cool, dark pantry for up to 6 months.
Use 2 tablespoons of the mix in place of one standard 1 ounce store bought onion soup mix packet.

Notes

For a French onion dip, whisk 2 tablespoons of the mix into 1 cup of sour cream or Greek yogurt and chill for at least 1 hour before serving. For a quick soup, whisk 2 to 3 tablespoons into 4 cups of hot water or broth and simmer for 10 minutes.

Nutrition Information:

Yield:

Serving Size:

1 tablespoon
Amount Per Serving: Calories: 15Total Fat: 0.1gSaturated Fat: 0gSodium: 340mgCarbohydrates: 3gFiber: 0.3gSugar: 0.5gProtein: 0.5g

Onion Soup Mix Recipe Questions

Can I substitute chicken bouillon for beef bouillon in this mix?

Yes, chicken bouillon powder works fine in this onion soup mix recipe and gives a slightly lighter flavor. It works especially well when you plan to use the mix in chicken based casseroles or dips rather than beef dishes.

Is homemade onion soup mix gluten free?

Most dried minced onion, onion powder, and cornstarch are naturally gluten free, but bouillon powders vary by brand. Always check the bouillon label specifically, since some brands add wheat based fillers while others are certified gluten free.

Can I use fresh onion instead of dried minced onion?

Fresh onion carries too much moisture for a shelf stable dry mix and will cause the whole batch to clump and spoil faster. Stick with dried minced onion flakes for this onion soup mix recipe so it stores safely at room temperature.

How much salt should I add if the bouillon powder I use is unsalted?

Start by adding half a teaspoon of salt to the full batch, then taste it dissolved in warm water before adding more. Bouillon powders vary widely in sodium content, so it is easier to add salt gradually than to fix an oversalted batch.

Can I double or triple this onion soup mix recipe?

Absolutely, this recipe scales up easily since it is just a dry blend with no cooking step to adjust. Simply multiply every ingredient by the same factor and whisk the larger batch just as thoroughly as a single batch.

What can I make with this mix besides dip and pot roast?

Try it stirred into a baked potato topping with sour cream, mixed into meatloaf for extra savory depth, or sprinkled over roasted vegetables before they go into the oven. It also makes a quick gravy base when whisked with pan drippings and a little flour.

Why This Recipe Works

This onion soup mix recipe works because it separates the three jobs a good blend needs to do: dried minced onion supplies texture and bite, onion powder supplies smooth background flavor, and bouillon powder supplies the savory backbone. Store bought versions often lean on just one or two of these, which is why they can taste flat or one note next to a homemade batch.

The small amount of cornstarch in the mix means it thickens gently whenever it meets liquid, whether that is sour cream for a dip or broth for a soup. That gentle thickening is exactly what makes the mix feel familiar in recipes that were originally written around the store bought packet.

Because every ingredient here is a dry, shelf stable pantry staple, the finished mix keeps its flavor and texture reliably for months without special storage. That reliability is what lets you make one batch and use it across a dozen different dinners instead of buying packet after packet.

You end up with a blend that tastes more like a scratch made soup base than a packaged shortcut, which is exactly the point of making your own onion soup mix recipe at home. It is a small five minute project with a payoff that shows up in nearly every savory dinner you make afterward.

If you have been reaching for the same paper packet for years, this onion soup mix recipe is worth the ten minutes it takes to mix up your first jar. Keep the recipe card handy, measure everything into an airtight container, and you will have a pantry staple ready whenever a recipe calls for it.

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