MUDDY BUDDY BROWNIES

Name: MUDDY BUDDY BROWNIES
Prep time: 30 min
Cook time: 25 min
Total time: 55 min
Cuisine: American
Ingredients: ¾ cup all-purpose flour; 1 teaspoon baking powder; ½ teaspoon salt; ½ cup butter (unsalted); 3 ounces unsweetened chocolate (chopped); ½ cup brown sugar (packed); ½ cup granulated sugar; 2 large eggs (at room temp); 1 large egg yolk (at romm temp); 1 teaspoon vanilla extract; 1 cup semisweet chocolate chips; ¼ cup butter (salted or unsalted, I use this); ¼ cup unsweetened cocoa powder (I prefer this brand); ¼ cup whole milk (or 2% milk); 1 cup confectioners sugar (sifted +); 2 cups confectioners sugar (sifted (yes, this is correct))