01 - Preheat the oven to 400°F. Line two baking sheets with parchment paper.
02 - In a small bowl, combine granulated sugar and ground cinnamon until evenly blended.
03 - Roll out puff pastry sheets on a lightly floured surface. Brush each sheet generously with melted butter and sprinkle evenly with the cinnamon sugar mixture.
04 - Using a pizza cutter or sharp knife, cut each prepared sheet into 4 long strips approximately 1 1/2 inches wide.
05 - Twist each strip several times, then shape into a bunny silhouette: form an oval for the body and loop the end upward to create the head, pinching gently to secure. Shape small portions of dough into ears and attach to the head.
06 - Place shaped bunnies on prepared baking sheets, leaving space between each for puffing during baking.
07 - In a small bowl, whisk together egg and milk until combined. Brush each bunny twist lightly with the egg wash mixture.
08 - Press mini chocolate chips or raisins into the dough to create eyes, if using.
09 - Bake for 13 to 15 minutes, or until twists are golden brown and fully puffed.
10 - Remove from oven and allow to cool slightly on baking sheets. Dust generously with powdered sugar before serving warm or at room temperature.