Microwave package with low pressure venting feature

A stand-up pouch configured for use in a microwave oven, the stand-up pouch comprising:

• a front panel;
• a back panel;
• a bottom gusset;
• a top edge having a top seal;
• a pair of side edges, each edge of the pair of side edges being sealed along the entire side edge between the top edge and the bottom gusset by a side seal to enclose an interior space, the interior space bound at least by the front panel, the back panel, the bottom gusset, the top edge, and the pair of side edges;
• a vent being positioned within the side seal and comprising:
• an outer portion that is unsealed and key-shaped, the outer portion including a head portion and a stem portion, the head portion having a polygonal shape comprising three to five interior angles, each angle measuring between 90 and 150 degrees;
• an inner portion surrounding the outer portion, the inner portion being a shaped alteration of the side seal and comprising:
• a first recessed portion extending inward from the side seal;
• a second recessed portion spaced from the first recessed portion and extending inward from the side seal;
• and
• an arcuate portion connecting the first and second recessed portions in a curvilinear path around the head portion and extending toward the interior space;
• a resealable closure, the resealable closure extending between the side edges and positioned between the top edge and the vent, the resealable closure providing access to the interior space, wherein the resealable closure can be opened and closed to prevent and allow access to the interior space;
• and
• wherein the configuration of the inner portion is adapted to facilitate controlled deformation and planned venting during heating.