Preheat oven to 350F. Grease and flour a 10 inch bundt pan or fluted tube pan.
In a large bowl, cream the shortening and sugar until light and fluffy with a handheld mixer.
Add the eggs, one at a time, beating well after each addition.
Beat in vanilla. Add bananas and mix well.
Combine the flour, baking powder, baking soda and salt; add to the creamed mixture alternately with sour cream, stirring just until combined. Stir in walnuts.
Pour into prepared pan.
Bake at 350° for 50-55 minutes or until a toothpick inserted near the center comes out clean.
Cool for 10 minutes before removing from pan to a wire rack to cool completely.
Brown Butter Glaze
In a medium bowl, add the powdered sugar.
Place butter in a small saucepan. Melt butter over medium heat until bubbly. Cook, stirring occasionally until golden brown. Remove from heat and pour butter into the bowl of powdered sugar.
Add milk and vanilla, stir until smooth.
Pour over the top of the cake and let it drip over the sides. Use a metal icing spatula to help smooth it out.
Place a piece of waxed paper under the wire rack before adding the glaze. This will help catch the run off.
This recipe calls for about 3 medium ripe bananas. The riper the banana, the stronger the banana flavor in your finished cake. Both ripe and overripe bananas are great here, it simply comes down to personal preference. Do nut use underripe/green bananas.
If you would prefer to make this cake without the walnuts, go right ahead. You can also substitute the nuts with chocolate chips if that's what you fancy.