2 cups sliced ripe banana
2 Tbsp brown sugar
1 Tbsp cold unsalted butter, diced
2 cups flour
1 tsp baking powder
1 tsp baking soda
1/4 tsp salt
1/2 tsp cinnamon
1/8 tsp allspice
1/8 tsp cardamom
1/3 cup low-fat buttermilk
1 mashed ripe banana
1 tsp vanilla extract
5 Tbsp unsalted butter, at room temperature
3/4 cup sugar
2 large eggs

Glaze
2 Tbsp unsalted butter
1 cup powdered sugar
2 Tbsp maple syrup
2 Tbsp low-fat milk
1/3 cup chopped pecans, toasted