Bake 55 to 65 minutes or until toothpick inserted in center of cake comes out clean and center of crack is dry to touch.
Cool cake in pan 15 minutes.
Remove from pan to cooling rack.
Cool completely, about 1 hour.
Place cooled cake on serving plate.
In 1-quart saucepan, heat 1/4 cup butter over medium heat, stirring occasionally, until golden brown.
Pour browned butter into medium bowl; stir in powdered sugar, vanilla and milk, 1 tablespoon at a time, until spreadable (mixture will thicken as it cools).
Let stand 1 to 2 minutes or until slightly cool; stir.
Drizzle over cake.
High Altitude (3500-6500 ft): Heat oven to 375F Bake 50 to 60 minutes.