01 - Preheat oven to 375°F. Line a baking sheet with parchment paper.
02 - Roll out puff pastry on lightly floured surface to smooth any creases.
03 - Brush entire surface of pastry with melted butter using a pastry brush.
04 - Combine granulated sugar and cinnamon in small bowl. Sprinkle mixture evenly over buttered pastry.
05 - Cut pastry into 12 even strips approximately 3/4 inch wide using knife or pizza cutter.
06 - Twist each strip by rotating ends in opposite directions. Form loop at bottom to create bunny ear shape. Press ends gently to seal.
07 - Place formed twists on prepared baking sheet, spacing evenly. Press ends lightly to secure shape.
08 - Bake for 12 to 15 minutes until pastry is puffed and golden brown.
09 - Transfer twists to wire rack. Allow to cool for 5 to 10 minutes until warm but not hot.
10 - Whisk together icing sugar and milk until smooth. Drizzle over cooled twists. Add sprinkles immediately if using.