Combine 1 cup (240 mL) cream and the butter in a sauté pan. Bring to a simmer, reduce by one-fourth, and remove from heat.
Drop the noodles into boiling salted water, return to a full boil, and drain. The noodles must be slightly undercooked because they will cook further in the cream mixture.
Put the drained noodles in the pan with the hot cream and