In a large bowl with an electric mixer beat egg yolks until thick and lemon colored; gradually beat in sugar.
In a small bowl whip the heavy cream to soft peaks. Gently fold in heavy cream, butter and cinnamon.
Sift flour and salt together; fold into yolk mixture to make a soft dough. Chill dough. Divide dough in half. Roll each half into 1/8” thick on a lightly floured surface; cut into 3” x ¾” strips. Cut a lengthwise slit in center of each strip.; pull one end through the strip.
Heat the oil for frying to 375º/ Fry a few at a time for a minute or two or until very light brown. Drain on paper towels and immediately sift confectioners sugar over both sides.