For a richer flavor, use high-quality dark chocolate instead of semisweet. If you don't have an ice cream maker, you can try the 'no-churn' method by freezing the mixture in a shallow pan, stirring every 30 minutes for a few hours to break up ice crystals. Feel free to experiment with other mix-ins, such as chopped nuts, mini marshmallows, or a swirl of cherry jam.