Au jus is a French culinary term that translates to “with juice” in English. In cooking practice, it refers to serving meat with its own natural juices, a technique that has enhanced the flavour and tenderness of roasted meats in French kitchens for centuries.
The process typically involves roasting or grilling meat and collecting the drippings and juices that accumulate during cooking to create a thin, flavourful sauce. Whilst this method is most commonly associated with beef—particularly prime rib—it works equally well with lamb, pork, and poultry.
Unlike traditional gravy, which uses flour or cornstarch to create a thick consistency, au jus remains thin and light. The best au jus has a clarity that allows you to see through it, with just enough body from the meat’s natural gelatin to give it substance. When properly made, it should glisten with tiny droplets of fat on the surface whilst remaining primarily liquid.
In addition to the meat juices, au jus benefits from aromatics such as herbs, garlic, and wine. These ingredients build complexity, transforming simple pan drippings into something that enhances rather than masks the beef’s natural flavour. The resulting sauce provides moisture and an additional layer of taste that makes each bite of your French dip sandwich more satisfying.
One of the key elements of a delicious French dip sandwich is the au jus sauce. This flavourful and savoury sauce adds a rich and meaty flavour to the sandwich, enhancing the overall taste and making it a satisfying meal. The au jus sauce is typically made from the roasted beef’s drippings, giving it a robust and hearty flavour.
To incorporate au jus sauce in a French dip sandwich, the bread is often dipped into the sauce, or the sandwich can be served with a small container of the sauce for dipping. Some recipes also call for brushing the bread with the au jus sauce before toasting or grilling, adding an extra layer of flavour to the sandwich.
The meaty and salty flavours of the au jus sauce pair perfectly with the tender and juicy slices of roast beef, creating a combination that is beloved by many. Additionally, the au jus sauce helps to keep the beef moist and adds a succulent juiciness to every bite of the sandwich. The dipping process also allows the bread to absorb some of the flavours from the sauce, making each bite more flavourful and enjoyable.
Drippings are an essential component in creating flavourful au jus, as they contain the concentrated essence of the meat being cooked. When meat is roasted or grilled, the natural juices and fats from the meat are released, collecting at the bottom of the pan. These drippings are rich in flavour, capturing the essence of the meat along with any seasonings or herbs used in the cooking process.
When incorporated into a sauce or au jus, these drippings add depth, richness, and complexity to the overall flavour profile of the dish. They provide a savoury, meaty undertone that complements the flavours of the meat being served. By using the drippings, you’re utilising every bit of flavour the meat offers, ensuring that none of its rich, savoury essence goes to waste.
The au jus created with the drippings adds moisture and juiciness to the meat and enhances its overall flavour. It acts as a finishing touch that ties the dish together, elevating it from good to exceptional.
Using beef drippings creates au jus with unmatched depth and complexity. The caramelised bits stuck to your roasting pan, called “fond” in culinary terms, contain concentrated flavour that transforms simple beef stock into something extraordinary.
1. Collect and Strain the Drippings
After removing your roast beef from the pan, pour the drippings through a fine-mesh sieve into a heatproof jug. Let it sit for 5-10 minutes—the fat will rise to the surface whilst any sediment settles to the bottom.
2. Separate Fat from Fond
Carefully skim off most of the fat from the surface (save a tablespoon or two for flavour). Pour the clarified drippings back into your roasting pan, leaving any gritty sediment behind.
3. Deglaze the Pan
Place your roasting pan over medium-high heat on the stovetop. Add the shallots and garlic, cooking for 2-3 minutes until fragrant. Pour in the red wine (if using) and scrape the bottom of the pan vigorously with a wooden spoon. Those caramelised bits contain incredible flavour.
4. Add Stock and Aromatics
Pour in your beef stock, then add the thyme, bay leaf, and Worcestershire sauce. Bring to a rolling boil, then reduce the heat to maintain a gentle simmer. Cook for 15-20 minutes, allowing the liquid to reduce by roughly one-third.
5. Strain and Season
Remove the pan from the heat. Strain the au jus through a fine-mesh sieve lined with muslin or a clean tea towel to remove all solids. Season with salt and pepper to taste—start conservatively, as beef drippings can be quite salty.
6. Final Presentation
Let the au jus sit for 5 minutes. A thin layer of fat will rise to the surface—you can skim this off completely for a lighter jus, or leave a few droplets for added richness. Keep warm over very low heat until ready to serve.
If you don’t have beef drippings on hand, you can still make delicious au jus using beef broth as the base. While it may not have the same depth of flavour as drippings, beef broth can still create tasty au jus with the right seasonings and ingredients.
1. Build Your Fond
Melt butter in a medium saucepan over medium-high heat. Add the onion and cook for 5-7 minutes until deeply golden at the edges. This caramelisation is crucial—don’t rush it. Add the garlic and cook for another minute until fragrant.
2. Add Tomato and Deglaze
Stir in the tomato purée and cook for 2 minutes, stirring constantly. The purée will darken slightly and develop a sweet, concentrated flavour. Pour in the wine or sherry, scraping any browned bits from the bottom of your pan.
3. Add Liquids and Simmer
Pour in your beef stock, then add the Worcestershire sauce, soy sauce, bouillon, bay leaf, and peppercorns. Bring to a boil, then reduce the heat to maintain a steady simmer. Cook uncovered for 20-25 minutes, reducing the liquid by about one-third.
4. Strain and Perfect
Strain the au jus through a fine-mesh sieve, pressing on the solids to extract every drop of flavour. Taste and adjust seasoning—you may need a pinch of salt, though the soy sauce and bouillon often provide enough.
When it comes to sauces that accompany meats, au jus and traditional gravy are two popular choices. Both are savoury sauces often served with roasted or grilled meats, but there are some key differences between the two.
Au jus is made from the natural juices of the meat, usually beef, and often seasoned with salt, pepper, and possibly a splash of red wine. Traditional gravy is typically made from the drippings of the cooked meat, which are then combined with a thickening agent such as flour or cornstarch and often flavoured with stock or broth.
While au jus is lighter and thinner in texture, traditional gravy is thicker and more substantial. Additionally, traditional gravy often has a more intense flavour due to the addition of rich stock or broth. Au jus emphasises the natural juices from the meat with minimal thickening, whilst gravy uses flour to create a thick, coating consistency.
Both sauces have their own unique appeal and can complement different types of meat in various ways, making them versatile options for enhancing the flavour of a meal.
When it comes to storing homemade au jus, it’s important to keep it fresh and flavourful for as long as possible. One of the best ways to do this is by using airtight containers. Airtight containers help to keep out air and moisture, which can cause the au jus to spoil more quickly.
Make sure to let the au jus cool completely before transferring it to the airtight containers. This will help prevent condensation from forming inside the container, which can also lead to spoilage. Once the au jus is in the containers, seal them tightly to create a strong barrier against external elements.
It’s also a good idea to label the containers with the date that the au jus was made so you can keep track of how long it’s been stored. By following these storage tips and using airtight containers, you can help your homemade au jus stay fresh and delicious for weeks or even months.
Properly stored, au jus keeps for 5-7 days in the refrigerator. When refrigerated, the gelatine in good au jus will cause it to gel completely—this is actually a sign of quality, not spoilage. Simply reheat gently, and it will return to liquid form.
For longer storage, au jus freezes beautifully for up to 3 months. Pour into ice cube trays and freeze solid, then transfer frozen cubes to a freezer bag. This allows you to thaw exactly the amount you need.
The French dip sandwich is a beloved classic, and the key to making the perfect version lies in the quality of the au jus. Creating the ideal French dip sandwich with au jus involves using the best combination of ingredients and techniques to achieve an irresistible flavour profile.
When preparing a French dip sandwich, it’s essential to use high-quality meat that complements the savoury au jus. Opt for tender slices of prime rib or roast beef, as they work exceptionally well with the rich flavours of the au jus, resulting in a truly delectable experience.
The bread must be sturdy enough to withstand dipping without disintegrating. Look for French baguette, ciabatta rolls, hoagie or sub rolls, or sourdough rolls. Toast your bread lightly—the crust should be crisp whilst the interior remains soft enough to compress slightly when you bite down.
Whether using leftover roast or deli beef, warming the meat properly makes an enormous difference. For leftover roast, slice thinly across the grain (2-3mm thick) and warm gently in a pan with a ladleful of au jus for 2-3 minutes. For deli beef, separate the slices and warm in barely simmering au jus for 30-60 seconds.
The Philippe Method (Wet): Quickly dip the bottom half of your toasted roll into warm au jus for 2-3 seconds. Immediately pile on warm beef and top with the second half. Serve with additional jus for further dipping.
The Cole’s Method (Dry): Pile warm beef onto your toasted roll without pre-dipping. Serve with a bowl of au jus on the side, allowing each person to dip as desired.
Utilising prime rib drippings for au jus in a French dip sandwich is a game-changer. The decadent flavours from the prime rib drippings infuse the au jus, creating a sumptuous dipping sauce that perfectly complements the succulent meat in the sandwich.
Mastering the art of creating the perfect au jus for your French dip sandwiches is a delightful journey that leads to unparalleled culinary satisfaction. By utilising the knowledge and techniques shared in this article, you can elevate your culinary skills and delight your taste buds with rich and flavourful au jus that will undoubtedly become a staple in your cooking repertoire.
Whether you’re working with the luxurious drippings from a Sunday roast or transforming pantry staples into something special, these techniques will serve you well. The beauty of au jus lies in its simplicity—quality ingredients and straightforward preparation create a sauce that transforms an ordinary sandwich into something crave-worthy.
Raghda Elsabbagh Most of us have childhood memories of viewing spinach as the enemy of the dinner plate. Despite watching Popeye transform into a powerhouse with a single can, many children—and even some adults—struggle to appreciate this […]
Salma Ihab This Mediterranean vegetable might seem intimidating with its armoured exterior and spiky leaves, but once you understand how to work with artichokes, they become one of the most rewarding ingredients in your kitchen. Whether you’re […]