Preheat the oven to 175°C (350°F). Grease and line a 9×5-inch loaf pan.
In a mixing bowl, cream the butter and sugar together until pale and fluffy.
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with milk, mixing until just combined. Avoid overmixing.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 45–55 minutes, or until a toothpick inserted in the center comes out clean.
Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.
