Pie crust venting

Pie crust venting is cutting slits or holes in a top crust so steam can escape while the pie bakes.

Pie crust venting: A two-crust fruit pie with a golden top, four neat slashes cut in a star pattern, thick bubbling filling visible in the slits
  • Techniques and preparation methods

Also called: steam vents

A fruit or custard pie with a solid top crust traps steam from the hot filling. Cutting vents lets that steam out, and professional troubleshooting charts list no steam vents in the top crust as a cause of the filling boiling out of the pie.

Vents can be simple slashes made with a knife, a pattern of small holes, or a decorative cutout such as a leaf shape, and some pies use a lattice that vents by design. Penn State Extension advises not cutting vents in the top crust of an unbaked pie before freezing it, and cutting the vent holes in the upper crust just before baking.

The vents also give a peek at the filling, so bakers can see whether it is bubbling and thick.

Related entries

Sources

Written by VanillaGoods in our own words from these sources. Last reviewed October 15, 2026.

  1. Freezing Pies and Pie Fillings, Penn State Extension
  2. Pie Faults and their Causes, Wayne Gisslen, Professional Baking (ckbk reference)