This video shows how to make a fluffy and chewy rice flour cocoa chiffon cake without oil. The fluffy texture is achieved by whipping the egg whites until stiff peaks form to create meringue, then carefully combining it with a batter of egg yolks, rice flour, cocoa, and milk. After baking, the cake is cooled upside down in the mold to prevent shrinkage, resulting in a healthy chiffon cake with a rich cocoa aroma despite being oil-free. It's also gluten-free, making it suitable for those with wheat allergies.