This video introduces a recipe for "Chocolate Warabi Mochi" that can be easily made with just four ingredients and only a microwave and refrigerator. Mix together potato starch, sugar, cocoa powder, and milk, then heat in the microwave several times, stirring each time, to create a smooth batter. The key is to mix thoroughly until there are no lumps. After chilling in the refrigerator until firm, put it in a container, cut it into 8 equal pieces, and sprinkle with cocoa powder to finish. It's a perfect snack with a bouncy, smooth texture, a gentle sweetness, and the aroma of cocoa. It's easy to make without using a stove, so it's recommended for beginners.