Apple custard pie has tender apple slices baked in a simple vanilla custard and topped with a buttery streusel. It is almost like eating an apple pie with the ice cream baked right inside.
Preheat oven to 425℉ and put pie crust pastry in a 9-inch pie plate.
In a medium mixing bowl, melt ¼ cup butter.
Stir in 1 14 oz can sweetened condensed milk.
Add 2 large eggs, ½ teaspoon ground cinnamon, and 1 dash grated nutmeg. Mix well.
Distribute 4 cups apple slices in the prepared pie crust and pour the custard mixture over the top.
In a small bowl, combine ½ cup all-purpose flour and ½ cup light brown sugar. Cut in the remaining ¼ cup butter until crumbly. If desired, you can stir in about ¼ cup of chopped nuts as well.
Sprinkle the crumb mixture over the pie.
Bake on the bottom rack of the oven for 10 minutes.
Reduce the heat to 375℉ and continue to cook for about 30-35 more minutes or until the crust and streusel are golden brown.
Cool at room temperature for an hour or two before moving the the refrigerator to chill.