Using milk instead of even half cream here is essential to get a clean powerful flavor. The alcohol in the cassis works to address the textural issues, making it scoopable and not icy.
12 oz raspberries (frozen works great)
6 oz sugar
3 oz cassis liqueur (20% alcohol)
12 oz milk
1/8 tsp xantham gum
1/4 tsp salt
Method:
Put all ingredients in blender (no need to defrost the raspberries)
Run on slowest speed for 5 minutes (to dissolve the berry flesh without breaking the seeds)
Press through a sieve to get rid of the raspberry seeds.
Process in gelato maker.