Place a teaspoon sized ball of the dough into each hole. Press in so that the dough covers the base and comes up the sides.
Roughly chop the peaches and place a teaspoon of this filling into each 'cookie cup'.
With the remaining cookie dough, roll flat to about 1/4 inch thick. Slice into thin ribbons to create the lattice tops.
Lay 2 or 3 strips across each cookie cup, the same way. Fold back every other strip halfway over itself. Place another strip of dough perpendicular to the first set of strips, laying it across the unfolded strips.
Unfold the folded strips back over the perpendicular strip. Fold back the strips that were left flat. Lay another strip of dough parallel to the first set of strips, but this time perpendicular to the second set of strips. Repeat this process until the lattice is complete. Trim any excess dough from the edges of the lattice and the muffin pan, press the edges into the dough to seal.
Bake 18-20 minutes, until the tops of each cookie cup are golden. Let cool before dusting with a little powdered sugar!