Preheat the oven to 350°F (175°C).

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

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla.

In a separate bowl, combine the flour, baking powder, and salt.

Gradually add the dry ingredients to the wet ingredients, alternating with milk.

Fill the muffin tin with batter and bake for 15-20 minutes or until a toothpick comes out clean.

In a bowl, beat the butter until creamy.

Gradually add powdered sugar and mix until well combined.

Stir in vanilla and milk until the desired consistency is reached.

Once the cupcakes are cooled, frost them with the prepared frosting.

Decorate with sprinkles or other toppings as desired.