Chocolate Sponge Cake Recipe

Sponge Cake
Ingredients:
Form d=20 cm, h=8.5 cm
Eggs (weight of 1 egg without shell 50-60 g) ... 5 pcs.
Sugar ... 150 g
Salt ... ¼ tsp
Vanilla extract ... 1 tsp
Cocoa ... 30 g
Baking powder … ½ tsp
Flour ... 125 g
Bake at 170 degrees Celsius for 40-50 minutes.