01 - Preheat oven to 400°F. Line two baking sheets with parchment paper.
02 - Mix granulated sugar and ground cinnamon in a small bowl until thoroughly combined.
03 - Roll out puff pastry sheets on lightly floured surface. Brush each sheet with melted butter and sprinkle evenly with cinnamon sugar mixture.
04 - Using pizza cutter or sharp knife, cut each sheet into 4 long strips approximately 1 1/2 inches wide.
05 - Twist each strip several times, then shape into bunny silhouette: form oval body and loop end for head, pinching to secure. Create small ear pieces if desired.
06 - Place bunny twists on prepared baking sheets, leaving space between each piece for expansion.
07 - Whisk egg with milk in small bowl. Lightly brush each twist with egg wash using pastry brush.
08 - Press chocolate chips or raisins into dough to create eyes if using decoration.
09 - Bake for 13-15 minutes until golden brown and fully puffed.
10 - Remove from oven, cool slightly, dust with powdered sugar before serving.