Source: https://www.youtube.com/watch?v=CHPn77jpt2w

120 g sugar
5.5 g salt
1 g lambda carrageenan
1 g locust bean gum

Mix

100 g water

Boil dry ingredients to dissolve

Simmer and whisk for 3 minutes

Remove from heat

Will gel into a syrup

400 g brewed coffee
30 g cocoa butter
2 g cocoa powder
10 g cherry syrup

Start with ~1/3 coffee, the rest of the ingredients, and the gelled syrup in a blender

Blend for less than a minute, then add the rest of the coffee

Blend until completely mixed

Chill in an ice bath, then make ice cream