Preheat oven to 350 F (176 C) and line a 6 muffin tray with paper cups.
In a medium bowl whisk together dry ingredients.
Stir together wet ingredients (except peaches) in a separate smaller bowl.
Pour wet ingredients into dry ingredients bowl.
Whisk together until a pancake batter like consistency is formed.
If batter seems to thick, just add a Tablespoon of milk at a time to thin. (batter should not be runny).
Fold in beach chunks, with a large spoon.
Spoon batter into paper muffin cups, dividing evenly amongst all muffin cups.
With a fork, stir together sugar in the raw and cinnamon in a small bowl.
Sprinkle cinnamon topping over each muffin. (just enough to lightly coat).
Bake muffins for 10 minutes.
Remove from oven, lay peach slices across the tops. Press very gently to stick to batter.
Transfer muffin tray back to the oven and continue baking for an additional 15-20 minutes or until toothpick inserted into center comes out clean.
Let muffins cool in tin for 10 minutes.
Remove paper cups and enjoy!