1Heat oven to 350°F. Spray 9x5-inch loaf pan with cooking spray.
2In medium bowl, mix flour, baking powder and 1/2 teaspoon salt; set aside. In large bowl, beat 1/2 cup butter and 1 cup brown sugar with electric mixer on medium speed until light and fluffy. Add eggs, one at a time, beating just until combined. Beat in vanilla and bananas until well blended. Gradually add flour mixture, beating on low speed just until incorporated. Pour batter into pan.
3Bake 45 to 55 minutes or until toothpick inserted in center comes out clean. Cool 20 minutes. Run knife around edges to loosen loaf; remove from pan to cooling rack.
4In small saucepan, heat 2 tablespoons butter and 1/4 cup brown sugar to boiling over medium heat, stirring constantly with whisk. Boil and stir 1 minute. Stir in whipping cream. Remove from heat; stir in powdered sugar and 1/4 teaspoon salt. Immediately drizzle over loaf (glaze will harden quickly).