The regional table / North Dakota
Lefse
Two decisions settle whether lefse tears: which potato you buy, and how cold it is when the flour goes in.
Every other dish on North Dakota's table comes from the German-Russian south-central counties. This one comes from the other half of the state, and the other half is bigger than most people outside it realise. The Federal Writers' Project guide of 1938 counted it: "Norwegian stock today constitutes 30 percent of the population of the State, and persons born in Norway make up 29.8 percent of its foreign-born population", and of the forty-two countries that had sent people to North Dakota, "Norway has the largest representation." Their settlements ran through the northern and eastern sections; in Fargo, the guide says, almost half the residents were of Norwegian descent, and of the Old World customs still kept there the book names almost nothing except the food — "the preparation of Norwegian foods such as lefse, lutefisk, fattigmand, and flad broed". Its definition of the first of those is still the best short one in print: lefse is "an unleavened potato bread baked in great flat, rough, gray sheets on top of an iron range".
The part nobody writes down is why a batch tears, and for that the state's own land-grant literature turns out to be the document. NDSU Extension's Potatoes from Garden to Table, publication FN630, by Julie Garden-Robinson, Asunta Thompson and Duane Preston, carries a table of potato cultivars for garden growing in the northern Plains with the recommended use beside each one — and in that whole table exactly one cultivar has lefse listed against it. It is Kennebec, a white-skinned, oblong, high-yielding potato whose other listed uses are baking, boiling, chipping and mashing. The bulletin explains what that implies: cultivars high in starch, or dry matter, are mealy and suit chipping and frying, while those "with a waxy texture are lower in starch content and specific gravity, and frequently higher in sugar content" and hold together in boiling. A waxy potato is a wet potato, a wet mash needs more flour to come together, and flour is what makes lefse tough and brittle. The same bulletin gives the second rule flatly, in its Old-fashioned Lefse: mix the potatoes with the fat and cream, "refrigerate until thoroughly cool", and only then "add flour gradually and knead smooth". Three cookbooks out of the North Dakota State Library's Prairie Recipes collection say the same thing in fewer words — the Grafton Lutheran ladies' Tried Recipes of 1958 to 1961 prints three lefse side by side on one page, and two of them are nothing but "Cool before adding flour" and "Add flour bit by bit as you roll out thin."
Why this version works
A mealy potato, not a waxy one. The only cultivar NDSU Extension names for lefse is Kennebec, and the bulletin's own logic says why: high dry matter, mealy, the kind of potato that chips and fries well. A waxy red is lower in starch and specific gravity and carries more water, and every extra spoonful of water in the mash has to be balanced with flour later. Russets are the everyday substitute and they work; what does not work is a salad potato.
Cold before the flour, every time. Warm riced potato drinks flour and keeps asking for more, and the dough you end up with is a flour dough with potato in it. Chilled overnight, the starch has set and the same potato takes barely a cup and a quarter. All four documented North Dakota versions insist on this and none of them explains it; it is the single change that turns a tearing batch into a good one.
As little flour as you can get away with. The Ladies of the U.C.T. cookbook puts it in one clause — roll each piece "very thin, using as little flour as possible". Flour on the board gets rolled into the sheet and stays there, and a sheet carrying too much of it goes stiff on the griddle and cracks at the first fold. Brush the board rather than dust it, and sweep it clean between rounds.
A dry griddle, and freckles rather than a tan. There is no fat in the pan and none in the dough beyond the butter and cream already in the potato. The sheet is cooked when dark spots have come up across it and it has lost its wet sheen — NDSU Extension says to bake it "until golden spots form", and the extension recipe in FN1513 gives 400°F and looks for bubbles. Cook past the spots and the water is gone, and a dry sheet cannot be folded.