01 -
Preheat oven to 175°C. Generously grease an 20 or 23 cm round cake pan with oil or butter. Sprinkle brown sugar evenly over the base. Line bottom with parchment paper, then wrap the outside of the pan with tin foil.
02 -
In a large mixing bowl, use a hand mixer to whisk together the egg, egg yolk, white sugar, vanilla extract, and melted butter until the mixture is pale and foamy, about 3 to 4 minutes.
03 -
Add the all-purpose flour and baking powder into the wet mixture. Stir with a spatula or low speed on the mixer until just combined.
04 -
Pour in the milk and fold in the diced peaches, mixing gently until evenly distributed without overworking the batter.
05 -
Transfer the batter to the prepared cake pan, smoothing the top. Bake in the centre of the oven for 55 minutes, or until the surface is golden and a skewer inserted in the centre comes out clean.
06 -
Remove from oven and let cool in pan. Once completely cool, refrigerate overnight before unmoulding and slicing for optimal flavour and texture.