Preheat your oven to 350°F (175°C) and grease your chosen baking pan to prevent sticking.
In a mixing bowl, whisk together the flour, sugar, and ground cinnamon until evenly combined. This creates a fragrant, spiced dry mixture.
In a separate bowl, beat the eggs and then add the melted butter, milk, and vanilla extract. Whisk until the mixture is smooth and slightly frothy.
Pour the wet mixture into the dry ingredients, folding gently with a spatula until just combined and no streaks remain; avoid over-mixing to keep the batter tender.
Fold in the sliced apples, distributing them evenly throughout the batter so each slice is coated with batter and will bake moist and tender.
Pour the batter into your prepared baking pan, spreading it out evenly with a spatula to create a smooth top surface.
Bake in the preheated oven for about 40-45 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Remove the cake from the oven and let it cool in the pan for 10 minutes, allowing the structure to set and making it easier to slice.
Transfer the cake to a wire rack or serving plate, and allow it to cool completely or serve warm for a fragrant, comforting slice.
Slice and enjoy this moist, cinnamon-scented apple cake as is or with a dusting of powdered sugar or a dollop of whipped cream.
