I'mm using with an electric hand mixture medium to high speed, beat the butter and sugar until it's light and fluffy it will appear lighter in colour and double the size add the eggs

In a small bowl, combine the flour, baking powder, and salt use a whisk to stir everything together well.Sift the flour mixture into the butter mixer this will remove any lumps from the cake flour so it incorporates into the butter.
With the mixer on low speed gradually pour in the milk, Continue to beat the butter just until all the flour is corporated.
Take extra care to not overmix.
Use spatula to spread the batter in an even layer. Be sure to spread it to the pan edge.

Put it inside the oven.after some minutes,check it with a wooden toothpick to see whether it's baked or not if the toothpick comes out with wet batter on it, it needs more baking time,
But if the toothpick comes out with a few dry crumbs, it is perfectly baked.