Beat butter and sugar until blended, add yolks and beat slowly until blended.
Beat in cherry juice, recipe attached below
https://cookpad.com/us/recipes/342477-fresh-cherrie-juice
Pour into saucepan and heat on low heat, stirring constantly until butter melts Increase heat to medium and cook, stirring with a rubber spatula reaching all sides of saucepan stirring continually until mixture thickens am coats the back of a spoon about 15 minutes. It should just reach 170 on a candy thermometer
Remove from heat add cherry extract, cool 5 minutes in pan, stirring occasionally them transfer to a bowl. Preah plastic wrap on surface to prevent a skin and cool to room temperature. Then refigerate until set and cold at least 4 hours
