Making Irresistible Apple Custard Impossible Pie is straightforward. Follow these simple steps to achieve your delicious treat:

1. Preheat your oven to 350°F (175°C).
2. Prepare the baking dish: Lightly grease a 9-inch pie dish or baking pan.
3. Combine dry ingredients: In a mixing bowl, whisk together the sugar, flour, baking powder, and salt.
4. Mix wet ingredients: In another bowl, beat the eggs. Gradually add in the milk and vanilla extract, whisking until well combined.
5. Combine the mixtures: Pour the wet mixture into the dry ingredients. Stir until just combined – be careful not to overmix.
6. Add apples: Fold in the sliced apples and melted butter into the batter. Ensure the apple slices are well-coated.
7. Pour the batter: Transfer the batter into the prepared pie dish, spreading it evenly.
8. Sprinkle with cinnamon: Dust the top with ground cinnamon, adjusting the quantity to your preference.
9. Bake: Place the pie in the preheated oven and bake for 40-45 minutes or until the edges are golden and the custard is set.
10. Cool: Once baked, remove from the oven and allow it to cool for 15-20 minutes before serving.