Systems and Materials Research Corporation (SMRC), based in Austin, Texas, received a $125,000 grant from the space agency to build a prototype of his food synthesizer. NASA is hoping they will be able to use the synthesizer to feed astronauts on long trips into space.

"Long distance space travel requires 15-plus years of shelf life," Contractor told Quartz. "The way we are working on it is, all the carbs, proteins and macro and micro nutrients are in powder form. We take moisture out, and in that form it will last maybe 30 years."

Dividing the various components of food in powder cartridges would theoretically enable users to mix them together, like the ingredients in normal recipes, to create a diverse array of nutritious meals.

To prove his idea works, Contractor printed chocolate. Now, he's aiming to build a more advanced prototype to print a pizza, according to Quartz.

The system will start by "printing" a sheet of dough, followed by a layer of tomato "sauce," which will consist of the powder mixed with water and oil. Instead of traditional toppings, the 3D-printed pizza will be finished off with a layer of protein, which can be derived from animals, milk or plants, Contractor told Quartz.

While NASA sees applications for 3D printers on future manned space missions, Contractor said his food synthesizer could also be an effective way of addressing the problem of food shortages from rapid population growth.

"I think, and many economists think, that current food systems can't supply 12 billion people sufficiently," Contractor told Quartz. "So we eventually have to change our perception of what we see as food."