Preheat your oven to 350°F (175°C).

Grease your loaf pan with butter or cooking spray.

In a mixing bowl, cream together the softened butter and sugar until light and fluffy.

Beat in the eggs one at a time, mixing well after each addition.

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

Gradually add the dry mixture to the butter mixture, alternating with the milk.

Stir in the vanilla extract.

Pour the batter into the prepared loaf pan and smooth the top.

Bake for 60 minutes or until a toothpick comes out clean.

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