Thin Layers of Rich Brownie Filled and Topped with Ganache

Name: Thin Layers of Rich Brownie Filled and Topped with Ganache
Yield: Makes about 2½ dozen.
Ingredients: 2 tbsp. granulated sugar; Pinch salt; 1 tsp. pure vanilla extract; 6 oz. unsweetened chocolate, coarsely chopped; 1 cup unsalted butter; 3 cups granulated sugar; 6 large eggs, lightly beaten; 1½ tsp. pure vanilla extract; 1¾ cups unbleached, all-purpose flour; 1 tsp. baking powder; 1 tsp. salt; 1½ cups finely chopped pecans, lightly toasted; 8 oz. bittersweet chocolate, finely chopped; 1 cup heavy (whipping) cream; 2 tbsp. unsalted butter