How-to Prevent Pastry Edges from Overbrowning
The edges of a pie pastry often brown before the rest of the pie is thoroughly baked. To protect the edges, fold a 12-in. piece of foil in quarters. Place the folded corner toward you. Measure 3-3/4 in. up each adjacent side and cute out an arc joining the two sides. Discard the center. Unfold the remaining foil and place it over the unbaked pie. Trim corners if necessary. Gently crimp foil around edge of crust to secure. Bake the pie for 20 to 30 minutes before removing the foil. Or add during the final 10 to 20 minutes of baking.