Gather flour, sugar, eggs, butter, milk, baking powder, salt, and vanilla
Preheat the oven if baking immediately
Soften the butter
Cream the butter and sugar together
Beat in the eggs one at a time
Mix in the vanilla
Combine the flour, baking powder, and salt in a separate bowl
Add the dry ingredients to the wet ingredients gradually
Pour in the milk little by little
Mix until smooth and well combined
Scrape down the sides of the bowl
Adjust the batter with a little more milk if needed
Use the batter immediately or pour into a prepared pan