Abstract: A moderator for cooking foods evenly in a microwave oven is described. The moderator is in the form of an enclosure having a fluid impervious outer layer. Attached to the inside surfaces of the outer layer is a liquid film forming layer which converts a dielectric fluid placed in contact with the layer into a thin liquid film which surrounds the cooking comestible.

Abstract: An improved microwave energy moderating cooking bag for enclosing, for instance, a food stuff such as a beef roast so that it can be cooked at a relatively high, constant level of power in a microwave energy field (eg; in a microwave oven) to a predetermined degree of doneness without needing to periodically reposition the roast to achieve uniform doneness. The improved bag is of the type having microwave enery moderating wall portions which comprise perforated electrically conductive sheet material: for example, aluminum foil.The bag is improved by virtue of having adjacent side-by-side segments of the perimetrical edges of the electrically conductive sheet material sufficiently offset with respect to each other to virtually obviate edge-to-edge electric field relations. That is, sufficiently offset to precipitate edge-to-surface electric field relations as opposed to edge-to-edge electric field relations.

Abstract: An improved cooking bag in which, for instance, food can be uniformly cooked by microwave energy in a microwave oven without having to adjust the level of power or stir or reposition the food as is now commonly practiced due to microwave energy being unevenly distributed in contemporary microwave cooking apparatus. The improved bag is of the type having microwave energy moderating wall portions which comprise arrays of complemental-shape microwave reflective areas of electrically conductive material such as aluminum foil, and substantially microwave transparent areas.