Boston cream doughnut
The Boston cream (pie) doughnut or donut is a round, solid, yeast-risen doughnut with chocolate frosting and a custard filling, resulting in a doughnut reminiscent of a miniature Boston cream pie. The doughnut was made out of inspiration from the Boston cream pie which was, in turn, created by chef M. Sanzian at Boston's Parker House Hotel in 1856. The cake consists of vanilla-flavored custard sandwiched between two-layers of sponge cake and topped with chocolate glaze and has been popular in Massachusetts since its creation. The doughnut adaptation of the pie is popular  not only in Massachusetts but throughout the United States and Canada. State doughnut of Massachusetts. The Boston cream doughnut was designated the official doughnut of Massachusetts in 2003 after the Boston cream pie itself was chosen as the state dessert in 1996. Although the doughnut's popularity made it a natural choice, it is one of only two official state donuts, the only other one being Louisiana, whose state donut is the "beignet".