Preheat your oven to 350°F (175°C). Grease and flour the two 9-inch round cake pans.
In a medium bowl, whisk together the all-purpose flour, baking powder, and salt. Set aside.
In a large mixing bowl, beat the softened butter and granulated sugar until light and fluffy, about 2-3 minutes.
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
Gradually add the dry ingredients and milk to the butter mixture, alternating between the two, and mix until just combined.
Fold in the chopped pecans.
Divide the batter evenly between the prepared cake pans.
Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then transfer them to a cooling rack to cool completely