Bronwen Wyatt's Chocolate Chiffon Cake

Ingredients

• 6 eggs (separated)
• ¼ tsp cream of tartar
• ¼ cup + 2 TBSP sugar
• ¾ cup + 1 TBSP sugar
• ¼ cup cocoa powder
• ½ cup walnuts ( toasted)
• 2 ¼ tsp baking powder
• 1 cup all purpose flour (or gluten-free flour blend)
• ¾ tsp salt
• ¼ cup plus 2 TBSP olive oil
• ½ cup plus 1 TBSP whole milk
• 1 cup water
• 1 tsp vanilla extract
• 1 TBSP cocoa powder
• 1 TBSP chicory powder (or Espresso powder)
• 1 cup California prunes (chopped)
• ½ tsp powdered gelatin
• 1 TBSP cool water
• ¼ cup + 1 TBSP sugar
• 1 TBSP chicory powder
• 1 TBSP cornstarch
• Pinch salt
• ¾ c milk
• 2 yolks
• 3 egg whites
• ¾ cup brown sugar
• ⅛ tsp cream of tartar
• ½ tsp salt
• 20 TBSP butter (cool room temperature)
• 3 TBSP cocoa powder