Choco Taisan (Filipino Chiffon Cake)

Ingredients

• 1 cup cake flour
• * 1/4 cup cocoa powder
• 1 tsp baking powder
• 1/2 tsp salt
• 6 large eggs, separated, room temperature
• 1/2 tsp vanilla extract
• 1/4 cup + 1/2 cup sugar, divided
• 6 tbsp or 90 ml fresh/whole milk
• 1/4 cup vegetable oil
• 1/4 tsp cream of tartar
• sugar and grated cheddar cheese for topping