InstaMash

InstaMash is a food item found in Fallout 3 and Fallout: New Vegas.

Background
 InstaMash is packaged in a white box with blue highlights. A tag-line toward the bottom of the box states that InstaMash comes "With Real Dig-In Flavor!" The "insta" part of the name most likely indicates that the contents are powdered and requires added water to swell, similar to instant mashed potatoes.