Remove odd pots and pans from oven.
Preheat oven to 350º / 180º.
Cream together butter and sugar.
Add eggs and crushed bananas.
Sift together flour, soda and salt. Add to creamed mixture. Add vanilla.
Mix just until combined. Do not overmix.
Pour into greased and floured loaf pan.
Bake at 350º / 180º for 55 minutes.
Keeps well, refrigerated.