Heat oven to 350ºF. In large bowl, mix flour, baking powder and 2 tablespoons of the sugar. Stir in butter until mixture is crumbly. On bottom and 1 1/2 inches up sides of 8-inch square glass baking dish, pat mixture evenly. Top with peaches. In small bowl, mix remaining sugar and the cinnamon; sprinkle over peaches. Bake 15 minutes.