1.Preheat oven to 180°C/350°F. Grease oven trays; line with baking paper.
2.Beat butter, sugar and egg in small bowl with electric mixer until smooth; do not overbeat. Transfer mixture to medium bowl; stir in sifted flour and cocoa, then chopped chocolate bar.
3.Drop level tablespoons of mixture about 5cm (2 inches) apart onto trays; bake about 15 minutes. Cool on trays.
Chokito bars are chocolate-coated caramel fudge bars with crunchy rice crisps. They are available from supermarkets and confectionery stores.Note