Oster makes a little grinder attachment for blenders. It's a little 8 oz. plastic jar that you use on your blender instead of the pitcher. You remove the blade assembly from the bottom of your blender pitcher, add your coffee/chiles/spices to the jar, screw on the blade assembly, and invert it onto the blender. It also comes with a screw-top lid for storage. I bought it at Wal-Mart for $4.96 and tried it on several brands of blenders before I bought it and it worked for all of them. I use it on my Hamilton Beach and you have the advantage of using any speed you need. And yes it powders :) I've quit using my coffee grinder since I bought it. Nancy