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Scotch Oat Cake
1 cup oat flour. 1/4 teaspoon salt Flour to make stiff dough The oatmeal must be finely ground and the dough very stiff. Roll out on a floured board to one eighth of an inch in thickness and bake the sheet in a very slow oven until dry and hard but not brown. Break into irregular pieces.
The page as printed is a fragment — only the salt and the "flour to make stiff dough" survive from the ingredient list, so the oatmeal and water quantities have to be reasoned out. What remains is enough to work from, because the method carries the whole recipe.
- The missing quantitiesScottish oatcakes are commonly made with something in the region of 2 cups fine oatmeal to a quarter-teaspoon of salt, bound with about 1/2 to 2/3 cup hot water and just enough flour to make the dough handleable; this is a reconstruction, not the book's own measure. What survives on this page is the salt and the flour, so the oatmeal and liquid amounts are simply absent.
- A very slow ovenRoughly 250-300F in modern terms. The point is dehydration, not baking: the sheet should dry through and stiffen without taking any colour, which will take a good while depending on thickness. Judge by dryness rather than by the clock.
- Finely ground oatmealNot rolled oats. Use fine or medium oatmeal, or pulse rolled oats in a food processor until they resemble coarse flour. Whole flakes make a 1/8-inch sheet difficult to hold together.
- The hinge: a very stiff doughEverything depends on this. A slack dough spreads, browns at the edges and bakes to a chewy biscuit rather than a dry, snapping one. It should feel almost too firm to roll.
- Rolling thinAn eighth of an inch is thinner than it sounds. Roll between the floured board and a sheet of parchment if the dough cracks, and press the fissures back together with your fingers rather than re-kneading.
- Breaking, not cuttingThe irregular pieces are the traditional finish and also the practical one — cooled oatcake shatters cleanly along its own lines. Let the sheet cool completely on a rack first or it will bend instead of breaking.
- StorageFully dried oatcake keeps for weeks in a tin. If it softens, five minutes in a 275F oven crisps it again.
Oatcakes are among the oldest forms of Scottish baking, made where wheat flour was scarce or costly, and traditionally cooked on a girdle over the fire rather than in an oven; the oven method here is a domestic adaptation of that hearth cookery. A dry, unsweetened biscuit was often served alongside ice cream in books of this period, the same role played by lady fingers, wafers and macaroons. The inclusion of wheat flour "to make stiff dough" is a departure from the plainest Scottish oatcake, which contains only oatmeal, salt, water and sometimes fat; the flour makes the dough easier to handle under a rolling pin. Why the ingredient list on this leaf is truncated is not clear from the page itself.