Coffee Chiffon Cake

Ingredients

• 50 ml instant coffee granules
• 50 ml boiling water
• 550 ml cake and pastry flour
• 375 ml granulated sugar
• 15 ml baking powder
• 5 ml salt
• 125 ml cold water
• 125 ml vegetable oil
• 5 egg yolks
• 250 ml egg whites (about 8 large)
• 2 ml cream of tartar
• 15 ml instant coffee granules
• 15 ml hot water
• 375 ml icing sugar
• 5 ml vanilla extract
• 15 ml water, can add up to 1 tbsp (15mL) more if needed