Preheat your oven to 350°F (175°C). Line an 8-inch loaf pan with parchment paper, leaving a slight overhang for easy removal.
In a large mixing bowl, combine the ground pecans and granulated sugar using a spatula until well blended, creating a slightly crumbly mixture that resembles coarse meal.
2 cups ground pecans
Add the eggs one at a time to the mixture, mixing thoroughly with a hand or stand mixer after each addition until the batter is smooth and slightly thickened. Add vanilla extract during this process.
2 cups ground pecans
Pour in the melted, cooled butter and fold it into the batter with a spatula until fully incorporated and the mixture becomes cohesive and slightly glossy.
2 cups ground pecans
Pour the batter into the prepared loaf pan, smoothing the top with a spatula. Sprinkle the chopped pecans evenly over the surface for a crunchy topping.
2 cups ground pecans
Bake in the preheated oven for 40-45 minutes, or until the top is golden and a toothpick inserted into the center comes out clean. The edges should pull slightly away from the pan, and the cake should emit a pleasant nutty aroma.