Created by ssej1078 on July 6, 2018
Step 1: In small bowl, beat egg with fork until combined; set aside.
Step 2: Place wire rack on rimmed baking sheet; set aside.
Step 3: Combine sugar and cinnamon in small bowl; set aside.
Step 4: Lightly flour your work surface, and unroll one sheet of puff pastry dough.
Step 5: Brush dough with half of beaten egg, and fold puff pastry dough up into thirds
Step 6: While dough is folded in thirds, cut out 3 donuts using a 3-inch donut cutter (or 3-inch round cutter, and then use a smaller round cutter to cut out the hole).
Step 7: Repeat with other sheet of puff pastry dough.
Step 8: Place cut out cronuts and holes on prepared wire rack, and freeze for 15 minutes.
Step 9: While dough is in freezer, heat oil to 375 degrees F in large, deep saucepan over medium-high heat.
Step 10: When oil is up to temperature, fry cronuts 2 at a time until golden brown and puffed—fry 3-5 minutes on one side, flip over, and fry for another 1-2 minutes.
Step 11: Drain briefly on paper towel-lined plate, and then roll cronuts in cinnamon sugar mixture.
Step 12: Repeat with remaining dough and donut holes.
Step 13: MAKE BUTTERMILK GLAZE:
Step 14: In medium bowl whisk together powdered sugar, buttermilk, salt, and vanilla until smooth.
Step 15: Thin with additional buttermilk as needed, one half teaspoon at a time.
Step 16: Dip each sugared cronut into glaze and place on wire rack until ready to serve.