This video shows a recipe for crispy yet fluffy chocolate muffins that can be easily made in one bowl without using butter. Mix the eggs and sugar until pale, then add the rice oil and milk and emulsify. Sift in the dry ingredients (cake flour, cocoa powder, and baking powder). Do not overmix the batter, and add the chopped chocolate and mix roughly. Pour the batter into cups and bake in a preheated oven at 170°C for 20 minutes. Check for doneness with a toothpick, and let cool before eating to allow the flavors to meld and make them even more delicious. When topping with chocolate, it is recommended to use heat-resistant chocolate chips to prevent them from turning white when baked.