It's dairy week, which does not necessarily mean using solely cow's milk products. For the signature, the bakers are asked to make a cake using some sort of cultured dairy, such as yogurt, sour cream or buttermilk, the cultures which not only are healthy but make the cake crumb inherently moist unless there is the mistaken urge to overbake. For the technical, the bakers are transported back to Tudor times and food at the table of Henry VIII, with the unexpected process of having to make cheese curds for maids of honor. The bakers are then transported geographically to India for the showstopper in having to make three types of mishti, requiring the time consuming process of making the milk based koiya, which the bakers have to ensure doesn't burn when they cook it as milk is apt to do.
—Huggo