What is the difference between Croque Monsieur and Croque Madame?
They are the same idea (ham + cheese + béchamel, broiled until gratinéed), but Croque Madame gets a fried egg on top. The yolk is the vibe.
Is this the classic version?
Classic croques are often made as a closed sandwich (two slices), then topped with béchamel and cheese and broiled. This recipe is an open-faced style, which gives you more bubbling, browned surface area and keeps it weeknight doable.
Do I have to use brioche?
No, but brioche is buttery and sturdy, which helps it hold up to béchamel and broiling. You can also use pain de mie, challah, or a thick-cut white sandwich bread. Avoid very airy bread that will collapse.
Can I make this without a broiler?
Yes. Bake at 425°F until the cheese melts, then switch to the highest heat your oven allows for a couple minutes to brown the top. You can also melt and brown the top in a toaster oven.
What ham works best?
Thin-sliced deli ham is totally fine. If you want it extra good, go for Black Forest or a simple French-style ham. If your ham is very wet, blot it with a paper towel so the sandwich does not steam.
How do I keep the béchamel from getting lumpy?
Whisk constantly while adding warm milk. If lumps happen anyway, do not panic. Keep whisking over low heat, or hit it with an immersion blender. You are still going to broil cheese on top. Life is forgiving.
Is this basically a Monte Cristo?
Nope. A Monte Cristo is typically an egg-battered, griddled or fried sandwich, and it is often served with powdered sugar and/or jam. A croque is all about béchamel + a gratinéed top and that broiler finish.