Sweet & Salty Cupcakes - Cupcake Fanatic

Ingredients

• 1/2 cup (1 stick) butter, softened
• 1 cup granulated sugar
• 2 large eggs, separated & at room temperature
• 1 tsp. vanilla
• 1 1/2 cups all-purpose flour
• 1 1/2 tsp. baking powder
• 1/4 tsp. salt
• 1/2 cup milk
• 1/8 tsp. cream of tartar