Beat eggs in a medium size bowl. Add the sugar, cornstarch, cinnamon and apple butter. Mix well.
Add milk and whisk together.
Press the pastry into a 9" pie plate that has been sprayed with cooking spray.
Pour the filling into the unbaked pie crust. Use a spoon to mix the filling once it is in the crust to be sure all of the ingredients are equally distributed.
Bake at 375 for 60-65 minutes, or until the center is set. It will still seem slightly "jiggly" in the very center, but a knife put in the center should come out nearly clean.
Cool in the pie plate on a wire rack. Do not slice into the pie right away, as it will continue to set as it sits.
Store the pie in the refrigerator once it is cooled.
Video
Notes
*It's best to use a high fat milk for this recipe. You can even use evaporated milk or half and half.*I would start checking to see if the pie is done after 55 minutes of baking. *If the edge of the crust is getting too brown, cover it with foil.The calories shown are based on the pie being cut into 8 pieces, with 1 serving being 1 slice of pie. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**