Peel the pears, remove the core and cut into fine pieces. Put in a saucepan with the wine and butter and cook until cooked. Beat through a sieve, season with sugar and cinnamon, add the cream. Put the mixture back in a saucepan, add the egg yolks and stir well. Put on the fire again, stirring constantly, and allow to thicken. Fill into portion bowls and let cool.