Golden Onion Quiche

This golden onion quiche is what happens when you treat caramelized onions like the main event instead of a backing singer. Two pounds of sliced onions get cooked down over a full hour, low and slow, until they collapse into a jammy, mahogany tangle that’s almost candy-sweet. There’s no shortcut here. Cranking the heat just burns the edges and leaves the centers raw.

Nutty, aged Gruyere is the right cheese for this job. Its sharp, slightly funky character cuts through the sweetness of the onions in a way that milder cheeses simply can’t manage, and it melts into long, silky strands rather than turning oily.

Flour sifted over the cooked onions does double duty. It absorbs any leftover butter while creating a thin starch raft that keeps the custard from weeping into the crust. The heavy cream is non-optional, half-and-half won’t set up the same way and the quiche will run when sliced.

Chef Tips

• Stir constantly in the last 15 minutes of cooking the onions. That’s when they go from golden to burned in 30 seconds.
• Blind-bake the pie shell for 10 minutes before filling to avoid the dreaded soggy bottom.
• Let the quiche rest 15 minutes after baking. The custard finishes setting and slices cleanly.
• Save any pan drippings from the onions and brush them on the crust edges before serving for extra savory shine.

Variations

• Add a few sprigs of fresh thyme to the onions while cooking for an herby French farmhouse note.
• Crisp up a handful of bacon lardons and scatter them through the filling for quiche Lorraine territory.
• Swap half the Gruyere for crumbled blue cheese for a bolder, more pungent version.