Preheat your oven to 350°F (175°C) and grease your 9x13-inch baking pan with non-stick spray or butter.
In a microwave-safe bowl, combine the semisweet chocolate morsels and butter. Microwave in 30-second intervals, stirring in between, until melted and smooth.
Once melted, stir in the sweetened condensed milk and egg until well combined.
Gradually add the Bisquick biscuit mix to the chocolate mixture, stirring until just combined.
Gently fold in the chopped pecans, ensuring they are evenly distributed throughout the batter.
Pour the brownie batter into the prepared baking pan, spreading it evenly. Bake for 25-30 minutes or until a toothpick inserted in the center comes out with a few moist crumbs.
Allow the brownies to cool in the pan for about 10 minutes. Then, spread the ready-to-spread chocolate frosting over the top for an extra layer of indulgence.
