Preheat your oven to 350°F (175°C).

Grease your 9-inch round cake pan with butter or non-stick spray.

In a mixing bowl, whisk together the flour, baking powder, and salt.

In another bowl, beat the softened butter and sugar until light and fluffy.

Add the eggs and vanilla extract to the butter mixture, blending until smooth.

Gradually add the dry ingredients to the wet mixture, alternating with milk.

Pour the batter into the prepared cake pan, spreading it evenly.

Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean.

Let the cake cool in the pan for 10 minutes before transferring it to a cooling rack.