Grease and flour a 9x5x3-inch loaf pan. Combine flour, baking powder, baking soda, and salt in a medium bowl.
Beat together butter and sugar in another medium bowl until light in color. Beat in eggs, one at a time. Stir in vanilla.
Stir in flour mixture alternately with bananas and milk. Stir in 3/4 cup of nuts. Pour in prepared pan.
Bake for 1 hour and 10 minutes or until wooden pick inserted comes out clean. Cool on rack for about 10 minutes. Run thin knife around edges. Remove bread from pan to rack to cool. Bread is better next day. Wrap tightly and store at room temperature.