Kefir marble cake | Bake the Click

Ingredients

• 360 gr. all-purpose flour
• 230 gr. sugar
• 4 eggs
• 250 gr. butter
• 1 tsp baking soda
• 1 ½ tsp baking powder
• 1 tbsp vanilla extract
• 400 gr. kefir
• 3 tbsp unsweetened cocoa powder (50 gr.)
• 2 tbsp powdered sugar (30 gr.)
• 125 gr couverture for frosting