Spray an 8x3 inch Fat Daddios's removable bottom pan with Pam. Lay parchment inside and spray again.
In a large bowl, using an electric mixer fitted with the paddle attachment, beat 1 package of the cream cheese, 1/3 cup of the sugar, and the cornstarch together on low until creamy, about 3 minutes, scraping down the bowl several times.
Blend in the remaining cream cheese, one package at a time, beating well and scraping down the bowl after each.
Increase the mixer speed to medium and beat in the remaining sugar, then the vanilla.
Blend in the eggs, one at a time, beating well after each.
Beat in the cream just until completely blended.
The filling will look light, creamy, airy, and almost like billowy clouds. Be careful not to overmix!
Pour into the pan.
Bake at 300 degrees for 15 minutes.
Lower to oven to 225 and I baked it for 1 hour and 40 mins.
Only the very center should have any jiggle left to it.
Shut oven off but leave cake in for 1 hour with the door shut.
Then crack open door and leave in another hour.
Once room temp, chill in fridge overnight.