Russkiy Biskvit Marble Keks is a type of Russian biscuit cake that is popular in Eastern Europe. The cake is made from a combination of flour, sugar, eggs, and butter, and is flavored with cocoa powder to create a distinctive marbled pattern.
The cake has a light and fluffy texture, and the cocoa powder gives it a slightly chocolatey flavor that is not too sweet. It is a versatile cake that can be enjoyed as a snack with coffee or tea, or as a dessert with fresh fruit or whipped cream.

