Kardeas Easy Entremet

Name: Kardea's Easy Entremet
Ingredients: One 16-ounce frozen pound cake, such as Sara Lee, thawed; 3/4 cup cold heavy cream; 1/3 cup confectioners' sugar; 1/2 teaspoon pure vanilla extract; Half an 8-ounce container mascarpone, at room temperature; Half a 13-ounce jar blackberry preserves; 2/3 cup firmly packed dark brown sugar; 4 tablespoons unsalted butter; 3 tablespoons heavy cream; 1 cup confectioners' sugar; 1 teaspoon pure vanilla extract; Pinch kosher salt; 1/3 cup finely chopped toasted pecans; Two 12-ounce packages lavender candy melts; 3 tablespoons coconut oil or vegetable shortening