In a large mixing bowl, cream the butter, cream cheese and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition. Add bananas and vanilla; mix wel. Combine the flour, baking powder, baking soda and salt; add to creamed mixture. Fold in 1 cup of pecans.
Transfer to two greased 8 x 4 x 2 inch loaf pans. Sprinkle with the remaining pecans. Bake at 350 for 1 to 1 1/4 hours or until a toothpick inserted near the center comes out clean.
In a small bowl, whisk the glaze ingredients; drizzle over loaves. Cool for 10 minutes before removing from pans to wire racks.