Preheat oven to 350°F. With electric mixer, blend first five ingredients. Spread in greased and floured 15x10" jelly roll pan, or 13x9" plus one 8" cake pan. Sprinkle half of cinnamon/sugar mixture lightly over dough base. Arrange peach slices by rows on top of base. Sprinkle with remainder of cinnamon/sugar mixture and drizzle melter butter over all. Bake for 25-30 minutes. (For thicker dough, omit 8" cake pan - use 13x9" pan only.)