Ptichye Moloko (Bird's Milk) Fudge

Prepare a 20x20 cm square baking pan in advance: wrap the bottom of the pan with foil from the outside.

Beat the softened butter with condensed milk until fluffy.

For the syrup, combine water, sugar, and agar-agar. Heat until the sugar completely dissolves and simmer over low heat for 4-5 minutes.

Once the syrup comes to a boil, start whipping the egg whites into a fluffy white foam.

While continuing to whip the whites, slowly pour in the hot syrup in a thin stream.

Add the butter cream in batches and beat until smooth.

Immediately pour the mixture into the prepared pan and let it cool completely. Then refrigerate for 3 hours to set.