Snickers Cheesecake Brownies

unsalted butter4oz. unsweetened chocolate1 ¼ cups sugar1 teaspoon vanilla extract¼ salt2 large eggs½ cup all-purpose flour

large egg1 tablespoon pure vanilla extract8 ounces cream cheese, softened1/2 cup plus 2 tablespoons confectioners sugar8 Snickers (fun size, 4.62 oz.), chopped