Add the chocolate to a medium bowl.
In a medium saucepan set over medium heat, whisk together the heavy cream, peanut butter and corn syrup. Bring the mixture to a simmer then remove it from the heat.
Pour the cream mixture on top and let the mixture sit, undisturbed, until the chocolate melts, about 8 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.
Pour the chocolate mixture into the cooled tart shell.
Transfer the tart to the refrigerator until the chocolate has fully hardened, a minimum of 1 hour.
Sprinkle the sea salt on top then slice and serve.
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