Mustard

Screw that stone grinder thing. It is ridiculous; grind, grind, grind, grind, and nothing happens apparently.

Electric coffee bean mill; zip, done. 

And I mean it. These tiny seeds are blasted in one second.

If the ancient Middle American natives had electric coffee bean mills and electricity then they would never have taken up carving out stone molcajetes. I can tell you that much right now.

Oh, the molcajetes are attractive for a primitive look. Modern cooks use their electric coffee mill as spice grinder and pour the finished mixture into a molcajete to serve it. But that practice does not say, "this is the grinder that was used to make this salsa," rather, it says, "this antique that is no longer used by sensible people is ironic as a simple bowl." It should be put in retirement, it's obscenely heavy and gross, but it is still a bowl.

Enough vinegar to turn the powder to sludge ↑.

Water added to adjust to desired viscosity. The powder keeps absorbing over hours ↓.

The amount filled another container and then some. 

I used this mustard. It is insanely strong. Like that Chinese mustard that can kill you.