Raspberry Butterscotch

In a small saucepan, using a silicone spatula, stir together the butter, brown sugar, corn syrup, and cream until the sugar dissolves. Bring the mixture to a boil over medium-low heat, stirring constantly. Simmer for about 4 minutes, stirring gently, until thickly bubbling. (An instant-read thermometer should read 244°F/118°C.) Remove the pan from the heat and pour the butterscotch into the ras