Heat the cream, butter and sugar until steaming and butter melts.
Whisk gently to make sure butter is melted and sugar is dissolved .
Remove from heat and add the chocolate and vanilla
submerging chocolate under the cream. Let sit for 4 to 5 minutes.
Gently whisk to smooth out the remaining chocolate.
Using a rubber spatula, go around the bottom edges to make sure all of the chocolate is mixed in.
Pour into prepared shell.
Refrigerate until set.