Banana Cupcakes with Caramel Buttercream

INGREDIENTS

• 3 cups sifted cake flour (not self-rising)
• 1 1/2 teaspoons baking soda
• 3/4 teaspoon baking powder
• 3/4 teaspoon salt
• 1 teaspoon ground cinnamon
• 6 ounces (1 1/2 sticks) unsalted butter, softened
• 1 1/2 cups packed light-brown sugar
• 3 large eggs
• 4 very ripe large bananas, mashed (about 2 cups), plus sliced bananas for garnish
• 3/4 cup buttermilk
• 1/2 teaspoon pure vanilla extract
• 1 cup chopped pecans
• Caramel Buttercream