Au Jus Sauce Recipe For French Dip Sandwiches: Rich Beef Broth With Herbal Depth

This au jus delivers the rich, savory depth that elevates any sandwich to restaurant quality. A simple blend of beef broth, herbs, and a touch of soy sauce creates complex flavor without fuss.

The secret is reducing it just enough to concentrate the taste while keeping it light enough for perfect dipping. Ready in 20 minutes, this sauce will become your go-to for French dips.

Ingredients for Au Jus Sauce Recipe for French Dip Sandwiches

Nine simple ingredients transform into that restaurant-quality dipping sauce you crave.

The beef broth is your foundation here. Low-sodium gives you control over the salt level, which is key since soy and Worcestershire already bring plenty. I grab Swanson or Progresso at the regular grocery store—they’re consistent and affordable. For the herbs, McCormick or Penzeys have great dried thyme and rosemary. Just crush them between your fingers before adding to wake up those flavors.

No Worcestershire? A splash of balsamic plus extra soy gets you 80% there. Out of fresh herbs? Dried works perfectly here (use one-third the amount if you’re subbing fresh for dried). If you’re avoiding gluten, tamari instead of soy sauce does the trick. The bay leaf is optional but adds that subtle background note—just don’t forget to fish it out before serving.

This keeps 5-7 days in the fridge and freezes beautifully for 3 months. I make a double batch and freeze in ice cube trays—perfect for single-sandwich portions. Reheat gently to keep it light enough for dipping.

Step-by-Step Instructions for Au Jus Sauce

This method builds deep flavor with minimal effort—just simmer and reduce.

Step 1: Combine Broth and Seasonings in a Saucepan

Pour all 4 cups Beef Broth into a medium saucepan. Add the 2 tbsp Soy Sauce and 1 tbsp Worcestershire Sauce, then stir to combine. These two ingredients form the umami backbone that defines a great au jus.

I use low-sodium beef broth here so I can control the salt level—this prevents the sauce from becoming overly salty as it reduces. The color should be a rich, deep brown from the start.

Step 2: Add Herbs and Spices for Depth

Sprinkle in all 1 tsp Dried Thyme, 1 tsp Dried Rosemary, 0.5 tsp Garlic Powder, 0.5 tsp Onion Powder, and 0.5 tsp Black Pepper. I crush the dried thyme and rosemary between my fingers as I add them—this releases their essential oils for maximum flavor.

Drop in the 1 whole Bay Leaf last. It adds a subtle earthy note that rounds out the other spices. Don’t skip it, but remember to remove it before serving—nobody wants to bite into a bay leaf.

Step 3: Simmer and Reduce to Concentrate Flavors

Bring the mixture to a boil over medium-high heat, then reduce the heat to medium-low to maintain a gentle simmer. You’ll see small bubbles breaking the surface consistently—this is the sweet spot.

Let it simmer uncovered for 15-20 minutes until the sauce reduces by about a third. The color will deepen to a rich mahogany, and the aroma will fill your kitchen with that classic French dip scent. Stir occasionally to prevent any spices from sticking to the bottom.

Step 4: Strain and Adjust Before Serving

After reducing, remove the saucepan from heat. Fish out and discard the bay leaf. For a smoother sauce, pour the au jus through a fine-mesh strainer to catch any stray herb pieces.

Taste and adjust seasoning if needed—though the soy and Worcestershire usually provide enough salt. If it’s too strong, add a splash of water. The sauce should coat the back of a spoon lightly but still be thin enough to soak into your sandwich.

Serving Suggestions for Leftovers

Classic French Dip

Serve this rich sauce in small ramekins for dipping thinly sliced roast beef on crusty French rolls. I like to toast the bread lightly first so it holds up to the juices without getting soggy. The contrast of crispy bread and tender meat is irresistible.

Sandwich Build Tips

Layer provolone cheese on the bread before adding the beef—it melts beautifully into the au jus. Use about 3-4 oz of meat per sandwich for the perfect ratio. The cheese creates a delicious barrier that keeps the bread from absorbing too much liquid.

Garnish Ideas

Float a few thyme sprigs in the au jus for a restaurant-worthy presentation. A sprinkle of fresh parsley on the sandwich adds color. I also love adding caramelized onions to the beef for extra sweetness that pairs perfectly with the savory sauce. 💫

Side Pairings

Crispy fries or sweet potato wedges make excellent accompaniments. The saltiness of the fries contrasts beautifully with the rich sauce. For a lighter option, try a simple green salad with a tangy vinaigrette.

Beverage Match

A cold lager beer cuts through the richness, while iced tea offers a refreshing contrast. For wine lovers, a dry red like Cabernet Sauvignon complements the beef beautifully. I always keep Samuel Adams in my fridge for this exact purpose. 🍺

Serving Temperature

Keep your au jus hot in a small slow cooker or fondue pot on warm setting. The ideal serving temperature is around 160°F—hot enough to stay fluid but not so hot it burns your mouth. Stir occasionally to maintain even heat.

Frequently Asked Questions