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Laboratory Exercises (Baking Powder Biscuits C flour)
Baking Powder Biscuits. 2 C. flour t. salt 3 t. baking powder 2 T. shortening C. (?) milk 1. Mix and sift dry ingredients three times. 2. Cut the shortening into the dry materials with two knives. The mixture should have something the appearance of cornmeal when the shortening is well worked into the flour. 3. Add enough milk to make as soft a dough as can be handled on the board. 4. Turn dough on floured board and roll or pat till 3/4 of an inch thick. 5. Cut with floured biscuit cutter and place on floured baking sheet and bake in a hot oven twelve to fifteen minutes. Cut the dough as economically as possible so as to have few pieces left to work over. Biscuit dough should be handled as little as possible.
A standard school-kitchen biscuit formula from the era when domestic science was taught as laboratory work. The proportions are conventional enough to reconstruct, but several quantities in the ingredient line are incomplete and should be judged against the ratios below.
- Missing amountsThe salt, the milk and the rolled thickness have all lost their fractions in this printing. A biscuit of this size normally takes about 1/2 teaspoon salt, roughly 3/4 cup milk, and dough rolled 1/2 to 3/4 inch thick. Treat those as the working figures rather than as what the book states.
- C, T and tC. is a standard 8-ounce cup, T. a tablespoon, t. a teaspoon. Two cups of flour is about 250 g if you spoon and level it; measuring conventions varied from book to book in this period, so weighing is the safer route.
- Baking powderThree teaspoons to two cups of flour is on the generous side by current practice, where roughly 1 to 1 1/2 teaspoons per cup of flour is usual. Powders of this date were generally single-acting rather than double-acting, and varied in strength; with a modern double-acting powder, 2 to 2 1/2 teaspoons gives plenty of lift without a metallic aftertaste.
- A hot ovenThe book gives no temperature; 'hot oven' in sources of this period corresponds to roughly 425-450F. Biscuits depend on a fast burst of heat to set the crust while the powder is still releasing gas; a moderate oven gives flat, pale results.
- ShorteningTwo tablespoons is a lean biscuit by today's standards, closer to a scone than to the rich Southern style. Lard or butter both work; if using butter, keep it cold so the pieces stay distinct and steam into layers.
- Sifting three timesThis was a genuine step when baking powder clumped and flour arrived lumpy. Modern flour and powder need one sift or a thorough whisk, no more.
- The hingeThe instruction to handle the dough as little as possible is the whole recipe. Mix only until the flour is damp, pat rather than knead, and press cuts straight down without twisting the cutter, which seals the edge and stops the rise.
- YieldTwo cups of flour gives about a dozen 2-inch biscuits. Best eaten within an hour of baking.
This comes from a student manual, and it reads like one: numbered steps, ingredients stripped to abbreviations, and an instruction to cut the rounds economically so as to waste nothing. Domestic science entered American schools in the late nineteenth century and was taught in rooms called laboratories, with the recipe treated as an experiment to be repeated exactly. Baking powder biscuits were a staple of that curriculum because they demonstrated a chemical leavener at work, required no yeast and no waiting, and could be mixed, baked and evaluated inside a single class period. Chemical leavening had spread rapidly through American kitchens after the mid-1800s, and quick breads of this kind became the household answer to bread on short notice, particularly in the South, where soft low-protein wheat suited the method.