Mix flour with baking soda. Beat the eggs with condensed milk and butter, add flour and soda to them, mix well.
Preheat the oven, pour the dough into the mold (if you need to cover with parchment, grease with vegetable oil) and bake at 180 * 25 minutes. (readiness can be checked with a toothpick.)
The biscuit is ready! If desired, sprinkle with powdered sugar. Let it cool down a little and put it on a platter! Enjoy your meal!