Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
In a large mixing bowl, cream together the softened butter and sugar until light and fluffy.
Beat in the eggs one at a time, then stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with the milk. Mix until just combined.
If desired, fold in chocolate chips or nuts for added flavor and texture.
Pour the batter into the prepared baking dish and spread it evenly.
Bake in the preheated oven for 30–35 minutes, or until a toothpick inserted into the center comes out clean.
Allow to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
Serving and Storage Tips
