The French have never been content to let good enough alone. Where American bakers accepted the rounded dome of a standard loaf, the French looked at that shape and asked: why should half my sandwich bread be crust? Pain de mie answers with geometry. Baked in a lidded pan, it emerges perfectly rectangular, with a crumb so fine and even you could read newsprint through a slice held to the light.

This is the bread of Parisian tea sandwiches and croque monsieurs. It's what the French reach for when they want toast that browns evenly, sandwiches that don't fall apart, and bread pudding with a texture like custard. The name means 'bread of the crumb,' and that tells you everything about the priorities here. We're not chasing a crackling crust. We're building structure.

The technique requires patience but not complexity. You'll make an enriched dough with butter and milk, let it rise twice, then bake it imprisoned under a lid that forces the bread to fill every corner of the pan. The result is a loaf so uniform it looks manufactured, yet the flavor announces itself as homemade from the first bite. Once you've tasted pain de mie fresh from your own oven, the plastic-wrapped imposters at the grocery store will seem like a different food entirely.