Preheat the oven to 375F (190C).

1. Prepare your filling in a large bowl. Start by mixing your eggs.
2. Mix in sugar and oil.
3. Add the flour with the baking powder.
4. Mix in your melted chocolate.
5. Add in the ground walnuts. This completed your filling.
6. Melt your butter, this is going to be used for the pan and in between baklava sheets. Spread some on your baklava pan.
7. Starting with your first roll, place a sheet of phyllo dough on your pan, followed by the rest of that set one by one. Spread melted butter in between each phyllo sheet, placing them on top of one another.
8. Spread your chocolate filling mixture onto one end of the sheet and roll.
9. Once done, place in your pan, and repeat with the remaining phyllo and mixture, placing them in your pan loosely next to one another.
10. Top with some of your melted butter and bake for 25-30 min at 375F (190C).
11. Prepare your syrup. Bring your water, sugar, and fresh lemon juice to a boil. Lower the heat, and cook for 10 minutes.
12. Once your baklava is baked and out of the oven, pour warm syrup over it.
13. Drizzle with melted chocolate and cool in the fridge before serving.