Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan with butter, then dust lightly with flour, tapping out any excess. This ensures the cake releases cleanly after baking.

Peel, core, and dice the apples into roughly 1/2-inch pieces. Toss them with 1 tablespoon of lemon juice to prevent browning and to add a subtle brightness to the flavor. Set aside.

In a large bowl, beat the softened butter and granulated sugar together using an electric mixer on medium speed for 3–4 minutes, until pale and fluffy. Scrape down the sides of the bowl halfway through for even mixing.

Add the eggs one at a time, beating well after each addition. If the mixture looks slightly curdled, add a tablespoon of your measured flour — this stabilizes the emulsion and keeps the batter smooth.

Sift the flour, baking powder, salt, and spices together in a separate bowl. Add the dry ingredients to the butter mixture in three additions, alternating with the milk, beginning and ending with flour. Mix on low speed just until combined — do not overmix.

Using a rubber spatula, gently fold the diced apples into the batter until evenly distributed. The batter will be thick — this is normal and helps support the fruit during baking.

Pour the batter into the prepared cake pan and spread it into an even layer using the spatula. Tap the pan gently on the counter two or three times to release any air pockets.

Place the pan on the center rack of the preheated oven. Bake for 45–55 minutes, or until a wooden skewer inserted into the center comes out clean or with just a few moist crumbs attached. If the top browns too quickly, tent loosely with foil after 30 minutes.

Remove the cake from the oven and let it cool in the pan on a wire rack for 15 minutes. This resting period allows the structure to firm up so the cake releases cleanly without breaking.

Run a thin knife around the edge of the pan, then invert the cake onto the wire rack. Remove the pan and allow the cake to cool completely before slicing — at least 30 minutes. Cutting too early may cause the crumb to compress.

Dust the cooled cake with powdered sugar just before serving. Slice into 8 portions and serve at room temperature with a dollop of whipped cream, a scoop of vanilla ice cream, or a drizzle of warm caramel sauce.

Store leftover cake in an airtight container at room temperature for up to 3 days. For longer storage, wrap individual slices in plastic wrap and refrigerate for up to 5 days, or freeze for up to 2 months. Thaw overnight at room temperature before serving.