Russian Korolevsky Cake (King's Cake)

Bahan-bahan (10 porsi)

• 6 extra large eggs (at room temperature)
• 3 cups sugar
• 3 cups sour cream
• 3 cups flour
• 3 tsp baking soda
• 3 tsp vinegar
• 1 Tbsp unsweetened cocoa powder
• 2 Tbsp poppy seeds
• 1 cup walnuts (toasted & chopped)
• 1 can sweetened condensed milk (cooked and at room temperature)
• 2 sticks unsalted butter (at room temperature)