Start with the whole raw seed (anywhere from 1/4 - 1 cup).
(optional) Add the raw quinoa to a dry skillet and toast the quinoa until it begins to brown and pop. It will have a distinctly nutty smell. Be careful here as quinoa can burn quite quickly, so keep a close eye on it.
Once toasted, transfer the quinoa to either a spice grinder, or a high-powered blender. Blend/grind the quinoa on high for 1 minute until it's a fine powder.
Place a fine mesh strainer over a bowl and add the quinoa mixture. Sift until only large chunks remain.
If the quinoa was toasted, allow the flour to cool completely before storing. If not, transfer it to a sealed container and store until you're ready to use it!