Ingredients for a 26.7 cm (10.5 inch) round pan : 7 large eggs 7 Tbsp water (40 ml) 10 Tbsp all-purpose flour (160 g) 4 Tbsp cocoa powder (50 g) 14 Tbsp sugar (210 g) 4-5 Tbsp chopped or ground walnuts (optional) The pan should be greased with butter and floured or lined with parchment paper. […]