Preheat oven to 350° F. Line a cupcake pan with 12 cupcake liners.
In a large mixing bowl, whisk together all-purpose flour, granulated sugar, baking powder, and salt.
Add in milk, vegetable oil, sour cream, egg whites, vanilla extract, and strawberry reduction. Whisk until the ingredients are well combined. If desired, add a small drop of pink gel food coloring.
Portion the cupcake batter into the cupcake liners using a large cookie scoop, filling the liners about ¾ full.
Bake for approximately 20 minutes until the cupcake tops bounce back when gently touched.
Remove the cupcakes from the oven and allow them to cool in the pan for a few minutes before transferring to a wire rack to cool completely.