Strawberry Mascarpone Layer Cake

Strawberry, Mascarpone Layer Cake
Ingredients
FOR THE CAKE
1 box of white cake mix, sifted
1 c. cake flour, sifted
1 c. sugar
1 1/3 c. whole milk
1 c. sour cream
2 tbsp. vegetable oil
2 tsp. vanilla extract
4 egg whites
FOR THE FILLING
1 1/2 c. heavy whipping cream
2 cartons of strawberries (or 1 large carton)
FOR THE FROSTING
12 oz. of mascarpone cheese (1 1/2 containers)
2 tsp. vanilla
1 c. powdered sugar, sifted
2 c. heavy whipping cream
Source Link: http://fortheloveofdessert.blogspot.ca/2013/08/strawberry-mascarpone-layer-cake.html