Preheat your oven to 356°F (180°C) and line a muffin tin with cupcake liners.

In a mixing bowl, beat together the eggs and sugar until pale and fluffy.

Gradually mix in the milk and vanilla extract until smooth.

Sift together the all-purpose flour, baking powder, and salt in a separate bowl.

Gently fold the dry ingredients into the wet mixture until just combined.

Fold in the softened butter until the batter is uniform.

Divide the batter evenly into prepared liners, filling each about two-thirds full.

Place the cupcake tray in the preheated oven and bake for 18-20 minutes.

Allow the cupcakes to cool in the tin for a few minutes before transferring them to a wire rack.