Preheat the oven to 180°C (350°F). Grease and lightly flour a 9-inch round cake pan or line it with parchment.

Crack the eggs into a medium bowl. Add the sugar.

Whisk the eggs and sugar until evenly combined and slightly glossy — about 30–60 seconds by hand.

Pour in the melted butter and the milk. Stir until the mixture is smooth and uniform.

Add the flour gradually, folding or stirring as you go. Stop when the batter is smooth and free of lumps. Do not overmix.

Pour the batter into the prepared pan and smooth the top with a spatula.

Bake on the middle rack for 30–35 minutes. Start checking at 28 minutes. A toothpick or cake tester inserted in the center should come out clean or with a few moist crumbs.

Remove from the oven. Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

Once cool, decorate as you like — simple sifted cocoa, glaze, buttercream, or fresh berries all work beautifully.