Preheat your oven to 350°F (175°C) and prepare a 9x13-inch baking dish by greasing it or lining it with parchment paper.

In a large mixing bowl, whisk together the granulated sugar, light brown sugar, and vegetable oil or melted butter until smooth. Add the eggs one at a time, blending well.

In a separate bowl, sift together the all-purpose flour, baking powder, and salt. Whisk to combine.

Gradually add the dry ingredients to the wet mixture, stirring gently until just combined.

Fold in the chopped pecans, ensuring they are evenly distributed in the batter.

Pour the batter into the prepared baking dish and spread it evenly. Bake for 30-35 minutes until golden brown and a toothpick comes out with moist crumbs.

Remove from oven and cool in the pan for 10 minutes before slicing into squares.