If you start with 2 cups of cream, how can boiling for 8-12 min reduce to 2 cups? I would think that boiling would reduce to 1.5 cups or there about.
"Combine cream, sugar, and lemon zest in medium saucepan and bring to boil over medium heat. Continue to boil, stirring frequently to dissolve sugar. If mixture begins to boil over, briefly remove from heat. Cook until mixture is reduced to 2 cups, 8-12 minutes"
https://www.pbs.org/food/recipes/lemon-posset-berries
"Combine cream, sugar, and lemon zest in medium saucepan and bring to boil over medium heat. Continue to boil, stirring frequently to dissolve sugar. If mixture begins to boil over, briefly remove from heat. Cook until mixture is reduced to 2 cups, 8-12 minutes"
https://www.pbs.org/food/recipes/lemon-posset-berries