An Update on Larry Cotton’s EZ Wobble Disk Home Coffee Roaster (2025)

This update on Larry’s Wobble Disk Home Coffee Roaster now has a shorter heating element, two options for handling and more design improvements

A screenshot of Larry Cotton's EZ Wobble Disk Home Coffee Roaster in action. The handle encompasses the whole roaster, which tips over to drop the coffee in a metal sieve.

We are big fans of doing it yourself, and in the case of home roasting, that sometimes means building your own machine or modifying a low-cost option to roast coffee and make it work. Customer and home roasting comrade Larry Cotton has been a fervent example of this DIY spirit, consistently reworking what he calls the “wobble disk” coffee roaster. It’s a unique design that effectively moves coffee and roasts it evenly.

Check out the latest iteration of the wobble disk roaster below, which now features a stripped down heat gun for a shorter heating element, two ways to configure the handle — affixed to the sifter or to the whole roaster, and some design updates.

A screenshot of Larry Cotton's EZ Wobble Disk Home Coffee Roaster in action. The disk is scooping up roasted beans to agitate the batch.

Larry has previously shared a PDF with instructions on how to build your own wobble disk roaster. Check out Build Your Own Home Coffee Roaster from 2024 for more information.

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