1 ready graham cracker crust
1 (8 oz.) pkg. cream cheese, softened
1/3 c. sugar
1 c. (1/2 pt.) sour cream
2 tsp. vanilla
1 (8 oz.) Cool Whip
Fresh strawberries for garnish

Beat cheese until smooth. Gradually beat in sugar. Blend in sour cream and vanilla. Fold in Cool Whip. Spoon into crust. Chill until set, about 4 hours. Garnish with fresh strawberries if desired.