2. In a medium bowl, gently whisk the eggs, egg yolk, water, milk, and salt until just combined. Add the flour and whisk until smooth. Slowly pour the browned butter into the mixture, whisking constantly.
3. Using the same nonstick pan used to melt the butter, set the pan over medium heat. Use a 1/3 cup measure, scoop the batter and pour it into the center of the hot pan. Swirl the batter around and out to the edges of the pan the thinner, the better. Return the pan to the heat and cook for 2 minutes. Use a rubber spatula to lift up the edge of the crepe and flip the crepe over. Cook on the other side for 1 minute.
4. Slide the crepe onto a plate and spread with Nutella. Fold the crepe in half, then fold in half again to form a triangle. Yummy!