French onion fried eggs
My favourite egg variation!
If you love the deep, rich flavour of French onion soup but want something quicker, cheesier, and perfect for brunch—this recipe is about to become your new obsession. Think sweet, slow-caramelised shallots, melty Gruyère or mozzarella, and a perfectly set egg, all piled onto buttery toasted sourdough. It’s simple, indulgent, and honestly feels a bit fancy without requiring much effort.
Why You’ll Love This Recipe
This dish hits that perfect balance of savoury, sweet, and creamy. The caramelised onions bring a deep umami richness, the cheese adds that irresistible melt, and the egg ties everything together into one comforting bite. It’s ideal for a weekend brunch, a quick lunch, or even a cosy dinner when you want something satisfying but not complicated.
Tips for the Best Result
Low and slow is key for caramelising onions—don’t rush it, that’s where all the flavour develops.
Gruyère gives a classic French onion vibe, but mozzarella works beautifully for a stretchier, milder finish.
Make extra onions—they keep well and can upgrade sandwiches, pasta, or even scrambled eggs.
No wine? No problem. A splash of water or stock still works to deglaze the pan.
Serving Ideas
Pair this with a simple green salad or a light soup if you want to turn it into a full meal. It also works brilliantly as a brunch centrepiece—just add coffee and you’re set.
Final Thoughts
This is one of those recipes that feels way more impressive than it actually is. It’s comforting, packed with flavour, and endlessly adaptable. Once you’ve made a batch of those caramelised onions, you’ll find yourself putting them on everything.
If you try it, don’t be surprised if it becomes a regular in your rotation—it’s that good.
🍽️ 2 portions
Ingredients
3 shallot onions, thinly sliced
25g (vegan) butter
1 tsp sugar
100mL white wine (optional)
Shredded Gruyère or mozzarella
Fresh thyme
2 sourdough slices
1 tsp chopped chives
Method
Caramelise the Shallots
Start by adding your butter to a medium-sized pan over medium heat. Once melted, add the sliced shallots and cook for about 10 minutes until softened.
Deglaze the pan with the white wine, then add the sugar, salt, pepper, and fresh thyme. Let everything cook gently for around 40 minutes, stirring frequently, until the onions are deeply golden, soft, and jammy.
To finish, increase the heat slightly and stir as you add the remaining wine. Let it simmer for about 5 minutes until the liquid evaporates. Remove from heat—this is your rich French onion base. You can store it in an airtight container and use it whenever you need a flavour boost.
Cook the Egg & Cheese
In a small pan, add a generous spoonful of the caramelised onion with a small knob of butter over medium heat. Shape the onion into a small circle and sprinkle your cheese on top.
Crack an egg over the cheese, cover with a lid, and cook for 4–5 minutes, or until the egg white is set but the yolk is still soft (or cooked to your liking).
Assemble
Toast your sourdough slices and spread with butter. Carefully place the cheesy onion egg mixture on top, then finish with a sprinkle of fresh chives.
FAQS and Tips
Can I make the caramelised onions in advance? Yes! In fact, it’s a great idea. Store them in an airtight container in the fridge for up to 3-4 days. You can also freeze them for longer storage.
Do I have to use white wine? Not at all. The wine adds depth, but you can substitute it with a splash of water, vegetable stock, or simply skip it.
What’s the best cheese to use? Gruyère gives that classic French onion flavour—nutty and rich. Mozzarella is a great alternative if you prefer a milder taste and extra stretchiness.
Can I make this recipe vegan? Yes! Use vegan butter, vegan cheese, and swap the egg for a plant-based alternative or skip it altogether—the caramelised onions still shine.
How do I know when the onions are properly caramelised? They should be deep golden brown, very soft, and slightly jammy in texture. If they’re still pale, keep cooking—this step is key for flavour.
Can I use regular onions instead of shallots? Absolutely. Yellow or brown onions work well, though shallots tend to be slightly sweeter and more delicate.
What bread works best? Sourdough is ideal because it’s sturdy and slightly tangy, but any thick-cut bread like country loaf or ciabatta will work.
Can I cook the egg differently? Of course. If you prefer, you can fry or poach the egg separately and place it on top of the cheesy onions.
How do I avoid burning the onions? Keep the heat medium to low and stir regularly. If they start sticking, add a small splash of water to deglaze the pan.
What else can I use the caramelised onions for? They’re incredibly versatile—try them in sandwiches, pasta, burgers, tarts, or even stirred into mashed potatoes.
