Preheat oven to 350 degrees F (175 degrees C). Grease and flour three 9 inch round pans.
In a large bowl, stir together cake mix, gelatin mix and flour. Make a well in the center and pour in water, oil, and eggs. Stir in half of the container of strawberries. Beat on low speed until blended. Scrape bowl, and beat 4 minutes on medium speed. Pour batter into prepared pans.
Bake in the preheated oven for 30 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.
To make the Strawberry Frosting: In a large bowl combine butter, confectioners' sugar and the remaining half of the frozen strawberries. Beat on high speed until creamy.
