1 pkg. butter flavored cake mix, baked according to directions in four layers

1 1/2 c. sugar
4 tbsp. cornstarch
4 c. strawberries
1/2 c. water
1 c. sour cream

Cool Whip

Cook sugar, water and cornstarch until thickened. Then add to strawberries. On bottom three layers of cake spread layer of sour cream, then layer of strawberries. Do not put sour cream or strawberries on top layer. Top with Cool Whip.