mama's banana nut cake

Ingredients

• 1 1/2 cups sugar
• 1 stick butter
• 2 - eggs
• 2 cups flour
• 1 teaspoon baking soda
• 3 - mashed ripe bananas
• 1 cup pecans,chopped
• 1 teaspoon vanilla
• 4 tablespoons buttermilk
• ICING:
• 1 stick butter,softened
• 1 box powdered sugar
• 1 - mashed ripe banana
• 1 cup pecans,chopped
• 1 teaspoon vanilla