Roomboterkoek

The name already tells you the law of the dish. Room means cream, boter is butter, and koek sits in that useful Dutch borderland between cake and cookie where half our best baking lives. Roomboterkoek is not a sponge, not a tart, not a polite little biscuit. It is a flat round of butter held together by just enough flour and sugar to make it sliceable.

In my grandmother's second notebook, boterkoek appears on the birthday pages, beside coffee quantities and the names of aunts who took sugar. That is where it belongs: not on a pastry-school cart, but on the table after someone has cut it into narrow wedges because every Dutch cook knows a large slice is bravado. But let me tell you a secret: the whole recipe is a test of honesty. Use margarine and you have made something flat and sweet. Use real roomboter, cream butter, and the cake becomes what it promised to be.

There is almost no technique here, for obvious reasons: the butter has already done most of the thinking. Still, hou het altijd simpel, always keep it simple, is not permission to be careless. Cream the butter and sugar until soft, press the dough evenly into the tin, brush it with egg, and score the top with a fork so the golden surface catches in little ridges. Then stop baking while the centre still feels tender. A dry boterkoek is a sad legal document. A proper one is smeuig, moist and dense, and it cuts like butter's own confession.