Preheat your oven to 350°F (175°C).
Grease and line an 8×8 inch baking pan with parchment paper.
2. Beat Eggs and Sugar
In a large bowl, whisk together eggs, sugar, and a pinch of salt until creamy and slightly frothy.
3. Add Wet Ingredients
Stir in melted butter, milk, and vanilla extract. Mix until smooth.
4. Combine Dry Ingredients
In a separate bowl, whisk together flour and baking powder.
Gradually fold the dry mixture into the wet mixture until just combined.
5. Layer Apples and Batter
Pour half of the batter into the prepared pan.
Arrange a layer of thinly sliced apples on top.
Pour the remaining batter over the apples and top with the remaining apple slices.
6. Bake
