Cream brown and white sugars with butter until very light and
fluffy. Add eggs, one at a time, beating well after each addition.
Stir in mashed bananas.

Sift flour with baking powder and salt. Mix milk and vanilla
together. Add each to first mixture alternately. Stir in the pecans.
Pour into a 10" well-greased tube pan. Bake in preheated oven for
1 1/2 hours, or until firm.

Place upside down on a cake rack; when cool, invert and turn out
onto rack.