I'm gonna guess something that covers the outer edges of the crust to keep it from burning. I've always just used foil.
I just use foil as well.
AI bot thing says all this:
### Purpose of a Pie Shield
1. **Prevents Over-Browning**: When baking a pie, especially one with a top crust, the edges of the crust can brown and burn more quickly than the rest of the pie. A pie shield helps to distribute heat more evenly, preventing the edges from becoming too dark.
2. **Improves Appearance**: By protecting the crust, a pie shield helps maintain a more uniform and appealing color across the entire pie.
3. **Enhances Texture**: Over-browned crusts can become dry and brittle. Using a pie shield helps retain the moisture and texture of the crust, making it more enjoyable to eat.
### How to Use a Pie Shield
1. **Place the Shield**: After the pie has been in the oven for a certain amount of time (usually when the crust starts to brown), place the pie shield over the edges of the pie.
2. **Monitor Baking**: Continue baking the pie, checking it periodically to ensure it is cooking evenly. Remove the shield if the crust needs more time to brown.
3. **Remove Before Serving**: Once the pie is done baking, remove the shield and allow the pie to cool before serving.
### DIY Pie Shield
If you don't have a pie shield, you can make one using household items:
1. **Aluminum Foil**: Crumple a piece of aluminum foil into a ball, then flatten it into a shield shape. Place it over the edges of the pie.
2. **Tinfoil**: Cut a strip of tinfoil and shape it into a ring that fits around the edges of the pie.
3. **Pie Crust Protector**: Some bakers use a pie crust protector, which is a pre-made shield designed specif
ically for this purpose.