Combine the cake mix, Greek yogurt, water, egg whites, 1 teaspoon of vanilla, and baking powder in a mixing bowl. Mix for 2-3 minutes using an automated mixer.
Fill each of the cupcake liners with batter.
Bake for 12-15 minutes. (Mine were good right around 13-14 minutes.)
Heat the cream cheese in small bowl in the microwave for 20 seconds to soften.
Add the powdered sugar to the bowl. Using a mixer, beat on high until the frosting becomes thick. Add in 1 teaspoon of vanilla. Continue to beat until the texture becomes creamy.
When the cupcakes have cooled, spread frosting on the top of each. Sprinkle with red sugar.