Chocolate Magic Cake | Food Stuff

Ingredients

• 6 1/2 tbsp all purpose flour (65 g)
• 1 stick of butter (125 g), melted
• 6 tbsp cocoa powder (50 g)
• 4 eggs, at room temperature and separated
• 2 cups milk (500 ml), warmed up
• pinch of salt
• ¾ cup sugar (150 g)
• 1 tsp vanilla extract
• 1 tsp vinegar
• 1 tbsp water