Preheat oven to 350 degrees. Put butter in 9" x 13" baking pan and place in oven to melt while it is heating. In a medium bowl mix together sugar, cocoa, flour and salt.
Remove pan from oven when butter is melted and add butter to bowl. With wire whisk blend mixture until evenly combined. Add eggs and vanilla and blend with whisk until all eggs are evenly mixed inches Pour batter into pan (no need to grease-the remaining butter in pan will be enough to remove brownies). Bake for 25 minutes, until a toothpick inserted in center comes out with a few crumbs attached-don't overbake. Cool on a wire rack. Frost with Browned Butter Frosting and drizzle with glaze. Cut into bars.
Place butter in a small saucepan over medium heat. Heat until butter begins to bubble and butter turns a light golden brown, stirring occasionally. Remove from heat and cool until lukewarm. Add butter, vanilla, powdered sugar and milk. Beat with mixer until light and fluffy. Spread on cooled brownies. Combine cocoa and water in a small zip-lock bag. Knead until thoroughly mixed. Snip a tiny bit off one corner of bag and drizzle contents over frosting.