Preheat oven to 350 degrees F.
Grease a 12x6 pan or something similar (for example, an 8x8 pan).
Mix Nutella, eggs, flour and salt together until well combined and no clumps and pour into greased pan. Sprinkle optional salt on top.
Bake for 20 minutes, remove from oven and let rest for about 5-10 minutes before cutting.
Drizzle with dulce de leche (recipe in notes section)!
Click here for dulce de leche recipe!