Preheat your oven to 350°F (175°C). Grease and flour a 9x13 inch baking pan.

In a medium bowl, whisk together the all-purpose flour, baking powder, and salt. Set aside.

In a large bowl, use an electric mixer to cream the softened unsalted butter and granulated sugar on medium-high speed until light and fluffy, about 3-4 minutes.

Beat in the room temperature eggs one at a time, mixing well after each addition. Mix in the vanilla extract.

Reduce the mixer speed to low. Add the dry ingredients in three parts, alternating with the milk in two parts, beginning and ending with the dry ingredients. Mix only until the last streaks of flour disappear. Do not overmix.

Pour the batter into the prepared pan and spread evenly with a spatula. Bake for 30-35 minutes, or until a wooden skewer inserted into the center comes out clean.

Let the cake cool completely in the pan on a wire rack before frosting, adding toppings, or slicing and serving.