Preheat the oven to 360 F / 180 C.
Line two 8-inch (20 cm) diameter round cake tins with parchment paper.
Add the sugar, flour, baking powder and butter. Mix with the flat beater until obtaining a homogeneous mixture.
Pour half of the preparation in each of the 2 cake tins.
Tap each tin against the work surface to smooth out the surface and get rid of air bubbles.