Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish with butter or cooking spray.

In a large mixing bowl, whisk together the granulated sugar, light brown sugar, and either vegetable oil or melted butter until smooth. Add eggs and mix until creamy.

In a separate bowl, sift together the all-purpose flour, baking powder, and salt. Fold the dry ingredients into the wet mixture until just combined.

Gradually incorporate the dry ingredients into the wet mixture, folding gently to maintain a tender texture.

Fold in the vanilla extract and chopped pecans until 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.

Allow to cool in the dish for 10-15 minutes before transferring to a wire rack to cool completely before slicing.