Snickerdoodles

The name first appears in print in the 1890s in New England newspaper recipe columns. Roots are likely Pennsylvania-Dutch — German immigrants brought Schneckennudeln (cinnamon-rolled spiral pastries) to Pennsylvania in the 18th century, and the cookie form developed as a quicker home alternative. The cream-of-tartar leavening predates baking powder's mass availability, marking the recipe as 19th-century. New England adopted it as a holiday and church-supper staple by the early 20th century.

Name first prints in 1890s New England newspaper recipe columns; roots are Pennsylvania-Dutch Schneckennudeln. Cream of tartar (potassium bitartrate) predates baking powder's mass spread — its acid leavens, controls the crackle, and inhibits sugar crystallization.

Surface is crackled cinnamon-sugar that crunches faintly under the first bite, then yields to a soft, almost cushiony centre with a distinct yogurt-tang from the cream of tartar. Cinnamon comes through in the warm-spice register, not heavy. The texture should be slightly underdone in the middle and stay that way for two days in a tin. A snickerdoodle that's crisp through is a sugar cookie that lost its way.

Cream of tartar (potassium bitartrate) is acidic; combined with baking soda it gives a controlled CO2 release that makes the cookie puff and then crack as the surface sets. It also inhibits sugar crystallisation, keeping the centre tender and chewy rather than crisp. Without it, you've got a sugar cookie. The cinnamon-sugar coating is applied before baking so it adheres to the dough as the surface dries — sprinkle after, and it falls off.