Perfect Vanilla Cupcakes

• 100g/ 3.54Oz (¼ cup + 3 tbsp) unsalted butter
• 100g/ 3.5Oz (1/2 cup) Sugar
• 1/8Tsp Salt
• 2 Eggs
• 1,5Tsp pure vanilla extract
• 150g/ 5.3Oz (1 Cup)  of  Cake flour
• 1Tsp Baking powder
• 100ml Milk

Bake at 330F/ 165℃ for 20 minutes