3-Ingredient French Onion Dip

This 3-Ingredient French Onion Dip is creamy, savory, and packed with classic onion flavor. Made with sour cream, mayonnaise, and onion soup mix, this easy appetizer comes together in minutes without chopping onions or spending hours caramelizing them on the stove.

It's the perfect dip for potato chips, crackers, fresh vegetables, and party snack boards. Whether you're hosting game day, preparing a holiday appetizer, or looking for a quick snack to share with family, this simple recipe delivers rich flavor with almost no effort.

Why You'll Love This French Onion Dip

Only three ingredients: Everything you need is easy to find at the grocery store.
Ready in minutes: Simply mix the ingredients together and let the refrigerator do the rest.
Creamy and scoopable: Sour cream and mayonnaise create a smooth texture that pairs perfectly with crunchy snacks.
Big onion flavor: Onion soup mix delivers a savory blend of onion, herbs, and seasonings.
Perfect for entertaining: Serve it at parties, barbecues, holiday gatherings, or casual movie nights.

Ingredients You'll Need

1. Sour Cream

Amount: 1 cup (240 g)

Sour cream is the creamy foundation of this dip. Its tangy flavor adds freshness and balances the richness of the mayonnaise. It also creates the smooth, thick consistency that makes French onion dip so satisfying with chips and vegetables.

For the best results, use full-fat sour cream for a richer texture. Reduced-fat sour cream can also work, although the finished dip may be slightly less creamy.

2. Mayonnaise

Amount: 1/2 cup (approximately 115 g)

Mayonnaise adds richness and a velvety mouthfeel. Combined with sour cream, it creates a balanced dip that is creamy without being overwhelmingly heavy.

Choose a good-quality mayonnaise that you enjoy the taste of on its own. If you prefer a lighter flavor, you can reduce the mayonnaise slightly and replace it with additional sour cream.

3. Onion Soup Mix

Amount: 1 packet (approximately 28 g, depending on the brand)

Dry onion soup mix provides the signature savory onion flavor without requiring fresh onions or a long cooking process. It typically contains dried onions, salt, seasonings, and other flavorings that give the dip its familiar taste.

Because soup mixes vary in saltiness, taste the dip before adding any extra salt. Check the package ingredients if you have specific dietary requirements.

How to Make 3-Ingredient French Onion Dip

Step 1: Combine the Sour Cream and Mayonnaise

Add the sour cream and mayonnaise to a medium mixing bowl. Stir with a spoon or spatula until the mixture is smooth and evenly combined.

Step 2: Add the Onion Soup Mix

Sprinkle the onion soup mix over the creamy base. Stir thoroughly, scraping the sides and bottom of the bowl to distribute the dried onion pieces and seasonings evenly.

Step 3: Chill for the Best Flavor

Cover the bowl and refrigerate for at least 30 minutes. For an even deeper onion flavor, chill for 2 hours or longer if convenient. This resting time allows the dried onions to soften and the seasonings to blend into the creamy mixture.

Step 4: Stir and Serve

Give the dip a good stir before serving. Transfer it to a serving bowl and place it on a platter with potato chips, crackers, pretzels, or fresh vegetables.

Enjoy it chilled for the best texture and flavor.

Easy Substitutions and Variations

Use Greek Yogurt

Replace some or all of the sour cream with plain Greek yogurt for a tangier dip. Full-fat Greek yogurt usually provides the creamiest result, while lower-fat versions may produce a thinner texture.

Make It Extra Creamy

For a richer dip, use full-fat sour cream and mayonnaise. Stir until smooth, then chill before serving so the flavors have time to develop.

Add Fresh Herbs

Although the classic recipe needs only three ingredients, a small sprinkle of chopped chives or parsley can add freshness and make the dip look beautiful on a party table.

Give It a Garlic Twist

Add a small pinch of garlic powder if you enjoy a stronger savory flavor. This creates a slightly different version while keeping the preparation simple.

Try a Lighter Version

Use reduced-fat sour cream and replace part of the mayonnaise with plain Greek yogurt. The dip may be less rich, but it will still deliver plenty of onion flavor.

What to Serve With French Onion Dip

Potato chips: Ridged or kettle-cooked chips are sturdy enough for generous scoops.
Crackers: Buttery crackers and whole-grain crackers make excellent dipping options.
Fresh vegetables: Serve with carrot sticks, celery, cucumber slices, bell pepper strips, or radishes.
Pretzels: Pretzel twists and pretzel crisps add a salty crunch.
Sandwiches and wraps: Use a small amount as a creamy spread for extra savory flavor.
Party platters: Add the dip to a snack board with vegetables, crackers, cheese, and other appetizers.

Tips for the Best Homemade Onion Dip

Give it time to chill: The flavor improves as the dried onions absorb moisture and the seasonings blend into the base.
Mix thoroughly: Make sure the onion soup mix is evenly distributed to avoid concentrated salty spots.
Taste before seasoning: Onion soup mix can contain plenty of salt, so extra seasoning may not be necessary.
Use a covered container: This keeps the dip fresh and prevents it from absorbing odors from other foods in the refrigerator.
Serve it cold: Chilling helps maintain a thick, creamy consistency.
Prepare it ahead: Making the dip a few hours before guests arrive gives the flavors time to develop.

How to Store French Onion Dip

Transfer leftover dip to an airtight container and refrigerate promptly. For the best quality, enjoy it within 3–4 days, provided the ingredients are fresh and it has been handled safely.

Do not leave the dip at room temperature for more than 2 hours, or more than 1 hour when temperatures exceed 90°F (32°C). Discard it if it has been left out beyond safe limits.

Freezing is not recommended because sour cream and mayonnaise can separate after thawing, leaving the dip watery or grainy.

Frequently Asked Questions

Can I make French onion dip the night before?

Absolutely! Prepare the dip, cover it, and refrigerate overnight. The extra resting time allows the dried onion pieces to soften and the flavors to blend beautifully. Stir before serving.

Why does my French onion dip taste salty?

Different onion soup mix brands contain different amounts of salt. If the dip tastes too salty, stir in a little extra sour cream to balance the flavor. Next time, begin with part of the packet and add more to taste.

Can I make this dip without mayonnaise?

Yes. Replace the mayonnaise with an equal amount of sour cream or plain Greek yogurt. The flavor will be tangier and the texture may be slightly different, but the dip will still be delicious.

How long should I chill the dip?

At least 30 minutes is recommended, but 2 hours usually gives the dried onion and seasonings more time to develop their flavor.

Is French onion dip the same as onion dip?

The names are often used interchangeably. Traditional homemade French onion dip commonly uses sour cream and a dry onion soup mix, while other onion dips may feature freshly cooked onions or different seasonings.