Add the chocolate to a medium bowl.
In a medium saucepan set over medium heat, whisk together the heavy cream and corn syrup. Bring the mixture to a simmer then remove it from the heat.
Pour the cream mixture atop the chocolate and let the mixture sit, undisturbed, for 5 minutes.
Whisk together the ingredients until the mixture is smooth. If the chocolate still hasn’t fully melted, microwave the mixture for 20-second increments, stirring between each increment, until smooth.
Remove the tart shell from the freezer. Pour the chocolate mixture into the tart shell, spreading it into an even layer.
Transfer the tart to the refrigerator until the chocolate has fully hardened, a minimum of 1 hour.
Arrange the raspberries on top then slice and serve.
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