Preheat your oven to 350°F (175°C) and grease a loaf or square baking pan, lining the bottom with parchment paper.

Peel, core, and slice the apples very thinly, aiming for 1/8-inch thickness.

In a large mixing bowl, whisk the eggs, granulated sugar, and brown sugar until light and fluffy for about 3-4 minutes.

Gently stir in melted butter, whole milk, and vanilla extract into the egg mixture until smooth.

Sift in all-purpose flour, baking powder, and salt, whisking until fully combined and smooth.

Fold the thinly sliced apples into the batter gently, ensuring they are well-coated.

Pour the mixture into the prepared baking pan, pressing down to remove air pockets, and sprinkle sliced almonds on top.

Bake for 45-50 minutes until golden brown and a toothpick inserted comes out clean.

Allow the cake to cool completely in the pan on a wire rack, then dust with powdered sugar before serving.