Light chocolate sponge cake (for the Prague cake)

Light chocolate biscuit is the base of the famous 'Prague' cake, created by confectioners inspired by European desserts during Soviet times. It has a soft and airy texture, and the addition of cocoa powder gives it a rich chocolate flavor. Condensed milk and sour cream make the dough tender, while the balance of sweetness and slight acidity adds depth to the taste. This biscuit is versatile: it pairs wonderfully with creams, syrups, and glazes while maintaining its tenderness and elasticity. In traditional Russian cuisine, it has become a symbol of festive treats and cozy home evenings. It can be served with nuts, fruits, or classic chocolate cream, creating a dessert that can charm even the most discerning gourmets.