1. Prepare the Phyllo Dough: Thaw phyllo dough according to package instructions and cover with a damp towel.
2. Preheat the Oven: Set your oven to 350°F (175°C) for even baking.
3. Butter the Baking Dish: Coat the bottom of the baking dish with melted butter using a pastry brush.
4. Layer the Phyllo Dough: Lay one sheet of phyllo dough, brush with butter, and repeat for 8 sheets.
5. Add the Nutella Filling: Mix Nutella and chocolate chips, then spread half over the phyllo layers.
6. Continue Layering: Add 4 more phyllo sheets, spread the remaining Nutella mixture, then top with another 4 sheets.
7. Cut the Baklava: Cut into diamond or square shapes for easier serving.
8. Bake: Bake for 45-50 minutes until golden brown and crisp.
9. Prepare the Syrup: Combine water, sugar, and honey in a saucepan, boil, then simmer for 10 minutes.
10. Pour Syrup Over Baklava: After baking, pour cooled syrup over hot baklava and let soak for 2 hours before serving.