- In a large bowl, beat cream cheese, squash, egg whites, sugar, pumpkin pie spice, and vanilla until combined. Do not over beat!
- Stir in evaporated milk. Pour into a pan over graham cracker crust.
- Bake at 350°F for 60-70 minutes until center is set (does not move when pan is slightly tilted).
- Cool on wire rack for 45 minutes. Cover and chill thoroughly.
- Slice and garnish with light whipped cream. Enjoy!