Maple Walnut Chiffon Cake - Get Cracking

Ingredients

• 500 ml all-purpose flour
• 375 ml sugar
• 15 ml baking powder
• 15 ml ground cinnamon
• 2 ml salt
• 175 ml cold water
• 125 ml vegetable oil
• 2 ml vanilla extract
• 2 ml maple extract
• 7 egg yolks
• 125 ml toasted walnuts, finely chopped
• 250 ml egg whites (about 8 large)
• 2 ml cream of tartar