Cream together butter and sugar. Add in salt and baking powder. Add in eggs one at a time. Mix in flour, vanilla and milk alternating until just combined. Fill cupcake wrappers or tins 3/4 full. Bake for 20-25 minutes. Cool completely before frosting.
Notes
Add in flavors, pipe in salted caramel, pipe in lemon curd, fruit, custard. Add cookie crumbles, coconut, carrot, zucchini.