Banana Chocolate Chip Cupcakes

3/4 cup sugar

1 1/2 cups all-purpose flour

1/2 teaspoon baking soda

1 teaspoon baking powder

1/3 cup semi-sweet chocolate chips

1/2 cup unsalted butter

1 pinch salt

3 mashed banana (slice, then mash with a fork)

2 large egg

teaspoon cinnamon

3/4 teaspoon vanilla extract for Buttercream Frosting

11/3 cups confectioners' sugar

1/2 cup at room temp unsalted butter

teaspoon vanilla extract

1/4 teaspoon cinnamon