Name: Broccoli au Gratin
Prep time: 5 min
Cook time: 30 min
Total time: 35 min
Ingredients: 700 gbroccolifresh or frozen; 300 gcheese (cheddar, parmesan, mozzarella, gruyere); 3 eggs; 200 mlyogurtor sour cream; 1 tspsalt; 1 handfulfresh thymeor 1 tsp dried thyme; 1 tbspolive oil

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Broccoli au Gratin is one of those cozy, no-fuss dishes that turns a simple vegetable into something deeply satisfying. It’s about bright green florets wrapped in molten cheese and a lightly set, tangy custard made from eggs and yogurt or sour cream. The top gets golden and just a touch crisp; the inside stays tender. That contrast makes it a dependable side or a light main on a busy weeknight.

What I love about this recipe is how few moving parts there are. A quick blanch, a little assembly, and the oven does the rest. You don’t need a pantry full of specialty ingredients — use the cheese you have on hand, choose fresh or frozen broccoli, and decide between yogurt or sour cream depending on what you prefer. It’s practical, forgiving, and quick to come together.

Below you’ll find a clear ingredient rundown, step-by-step instructions taken from the original method, troubleshooting advice, and sensible ways to tailor the dish to your family’s tastes. Read the steps through once, then get started. You’ll be serving Broccoli au Gratin in under an hour with minimal cleanup.

Ingredient Rundown

700 g broccoli — fresh or frozen; the backbone of the dish. Fresh gives the best texture, frozen works well if blanched and drained thoroughly.
300 g cheese (cheddar, parmesan, mozzarella, gruyere) — provides richness, melt and surface color. Mix types for flavor depth and a good melt.
3 eggs — bind the filling and set into a custardy texture when baked.
200 ml yogurt or sour cream — adds tang and creaminess; yogurt is lighter, sour cream gives a touch more richness.
1 tsp salt — seasons the whole dish; taste the cheese first and adjust if yours is very salty.
1 handful fresh thyme or 1 tsp dried thyme — brings an herbal lift. Use fresh leaves for color and brightness; dried works in a pinch.
1 tbsp olive oil — used to grease the baking dish so the gratin releases cleanly and to add a subtle flavor.

From Start to Finish: Broccoli au Gratin

Preheat the oven to 180 °C (356 °F).
Prepare the broccoli: if fresh, wash and cut into bite-sized florets; if frozen, keep as is. Bring a large pot of water to a boil and cook the broccoli for 5–7 minutes, until slightly tender. Drain thoroughly and shake off excess water; pat dry with kitchen paper if needed.
Grease an ovenproof dish with the 1 tbsp olive oil.
Spread the drained broccoli evenly in the greased dish.
Sprinkle all 300 g of the cheese evenly over the broccoli.
In a bowl, whisk together the 3 eggs, 200 ml yogurt or sour cream, and 1 tsp salt until smooth.
Pour the egg–yogurt mixture evenly over the broccoli and cheese.
Add the thyme: if using fresh, strip the leaves from the stems and scatter the handful of leaves over the top; if using dried, sprinkle 1 tsp dried thyme evenly.
Bake in the preheated oven for 20–25 minutes, until the cheese has melted, the mixture is set, and the top is golden and lightly crisp.
Remove from the oven and let rest for a few minutes before serving.

Why You’ll Keep Making It

This gratin hits a lot of small marks that make a recipe repeatable. It uses common fridge staples: broccoli, eggs, and a little dairy. It’s forgiving — a little underdone or just a touch overbaked still tastes good. The technique of blanching then baking ensures even cooking and a bright color. The egg-yogurt base keeps the dish lighter than a heavycream sauce while still delivering a rich mouthfeel.

It’s also versatile on the table. Serve it alongside roast chicken, pan-seared fish, or as part of a casual vegetarian meal. It can be made ahead and reheated without losing too much texture. In short: comfort without fuss, and a straightforward path to something that looks and tastes special.

Easy Ingredient Swaps

Broccoli — fresh or frozen both work; frozen is convenient and cuts prep time.
Cheese — the recipe lists cheddar, parmesan, mozzarella, gruyere; use any combination from that list to change flavor and melt behavior.
Yogurt or sour cream — choose the one listed depending on how tangy or rich you want the custard.
Thyme — recipe allows fresh or dried thyme; follow that guidance for the amount listed.

Equipment & Tools

Large pot — for boiling the broccoli.
Colander or sieve — to drain the broccoli thoroughly.
Kitchen paper — handy for patting excess water off florets.
Ovenproof dish — large enough to hold the broccoli in a single even layer.
Bowl and whisk — to mix the eggs, yogurt/sour cream, and salt.
Measuring spoons and cups — for accuracy on the olive oil, thyme, salt, and liquids.
Oven — preheated to 180 °C (356 °F) as directed.

Missteps & Fixes

Soggy broccoli: That’s usually caused by incomplete draining after blanching. Drain well in a colander, then shake or pat the florets dry with kitchen paper. Spread them out in the dish rather than piling them so excess moisture can evaporate during baking.

Runny center: If the custard hasn’t set, the gratin needs more time. Return it to the oven for 3–6 minutes and check again. If the top is browning too fast while the center remains loose, tent the dish loosely with foil and finish baking.

Top burns before filling is set: Lower the oven rack one level so the top isn’t directly under the heating element. Reduce heat slightly if your oven runs hot, or tent with foil mid-bake and remove it for the final few minutes to re-crisp the top.

Make It Your Way

The structure here is simple: broccoli + cheese + egg-yogurt custard + thyme. Small adjustments change the character. For a nuttier top, use more parmesan or gruyere. For a milder, gooey result, favor mozzarella and cheddar. If you prefer a tangier bite, choose sour cream instead of yogurt. Keep the amounts the same; these swaps change flavor but not the balance of the bake.

If you like a crisper surface, you can broil for a very short time at the end — watch it closely and remove the dish the moment the top reaches the color you want. Let the gratin rest briefly before serving so the custard firms up and slices neatly.

If You’re Curious

Texture-wise, the goal is contrast: tender broccoli, creamy interior, and a slightly crisp, golden top. The eggs set the structure without making the whole dish heavy; the yogurt or sour cream adds a bit of tang that keeps the flavors lively. If your cheese is particularly salty, reduce the 1 tsp salt slightly when whisking the eggs and yogurt.

Time-wise, most of the work is passive. Blanching takes a few minutes, assembly takes less than ten, and baking finishes it. Plan for about 35–45 minutes from start to finish, depending on blanching time and oven variability.

Save for Later: Storage Tips

Refrigerate leftovers in an airtight container for up to 3–4 days. Reheat gently in a low oven (around 160–170 °C / 325–340 °F) until warmed through to preserve texture. You can also reheat single servings in a microwave, but the top won’t crisp back up.

Freezing is possible but not ideal. The custard’s texture can become grainy and the broccoli softer after thawing. If you do freeze, cool completely, wrap tightly, and freeze for up to 1 month. Thaw overnight in the fridge and reheat in the oven to restore some of the original texture.

Quick Questions

Can I use frozen broccoli? — Yes. Keep it frozen until you’re ready to blanch or follow the blanch step as written. Drain and pat very dry before assembling.
Can I prepare this ahead? — Yes. Assemble the gratin, cover, and refrigerate for a few hours; add a few extra minutes to baking time if chilled straight from the fridge.
How do I know it’s done? — The cheese will be melted, the top golden, and the custard set — no visible runniness when you gently jiggle the dish.

Final Thoughts

Broccoli au Gratin is dependable, comfortable, and straightforward to pull off. It rewards simple, quality ingredients used without overcomplication. Follow the steps in order, mind your drainage after blanching, and use the cheese combination you enjoy. The result is a dish that feels thoughtful enough for guests and simple enough for a weeknight.

Make it once exactly as written to get the balance, then tweak the cheeses or the tang level to suit your preferences. Keep this recipe in your rotation — it’s the kind of recipe you’ll return to whenever you want something warm, cheesy, and reliably delicious without a fuss.

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