Preheat oven to 350°. Cream butter, cream cheese and sugar until light and fluffy, 5-7 minutes. Add eggs, 1 at a time, beating well after each addition. Beat in bananas and vanilla. In another bowl, combine flour, baking powder, baking soda and salt; gradually add to creamed mixture. Fold in 1 cup pecans.
Transfer to 2 greased 8x4-in. loaf pans. Sprinkle with remaining pecans. Bake loaves, covering with foil if they darken too rapidly, until a toothpick inserted in each center comes out clean, 1-1-¼ hours. Cool 10 minutes before removing to wire racks.
While loaves are still slightly warm, whisk glaze ingredients. Drizzle over loaves, using a baking pan or parchment under racks to catch excess. Cool completely.