In a large bowl add 15 oz 100% pure pumpkin puree, sugar, eggs, vanilla extract, and evaporated milk. With your hand mixer beat on low mix until all combined.
Add all purpose flour, pumpkin pie spice, salt, baking powder, baking soda, and cornstarch. Mix on low until combined.
Transfer batter to a container with a pour spout like a glass measuring cup.
Pour batter 3/4 of the way full into a muffin tin.
Bake in a 350°F oven for 30 minutes or until the center is set and not runny.
After the pumpkin pie cupcakes are finished baking. Remove from the oven and allow to cool to room temperature.
Once cooled to room temperature. Remove pumpkin pie cupcakes and refrigerate in a covered container until chilled.
When ready to serve top with a dollop of whipped cream and a sprinkle of pumpkin pie spice seasoning.