Preheat the oven to 350F.
Line a 10 x 15 x 1- inch baking sheet with parchment paper and spray the paper with nonstick spray. Set aside.
Whisk together the dry ingredients. Set aside.
In a large mixing bowl beat 4 eggs and the sugar. Add oil, pumpkin and vanilla and mix to combine. Mix in dry ingredients and transfer to the prepared pan, then smooth the top.
Mix softened cream cheese, sugar, cornstarch and vanilla until smooth.
Add eggs and mix to combine.
Transfer the mixture in piping bag or zip-lock bag and cut off the corner.
Draw the lines of cream cheese mixture diagonally on top of pumpkin pie mixture to make a grid. Bake 25-30 minutes, until the toothpick inserted in the center comes out clean.
Cool completely before serving.
ENJOY!