Dec. 17, 2019
“EQUIPMENT: $10 stainless steel flour sifter purchased at Bed, Bath and Beyond. The heat source is a standard gas-stove burner. A 6 inch diameter, disc-shaped heating element was fashioned by layering 5 pieces of 1/8” galvanized hardware cloth
[UPDATE 1/6/2020: David recommends using a non-galvanized steel hardware cloth (purchase at www.mscdirect.com)]. A similar-shaped single layer piece was form-fitted over the top of the sifter to prevent beans from flying out. The element evenly distributes and it glows providing infrared in addition to the convective heat coming from the burner. A vise is used to stabilize the sifter and as a hand-grip. Headlamp is used to judge color. Cooling is on cookie sheet.”
the stove top/flour sifter coffee roaster is probably the best value in home-made roasters. David’s is a bit labor-intensive (the roasting, not the building!) and it makes a mess around the gas burner, but the results are quite even. and a cookie sheet is a great heat sink for cooling the beans. good job! one more note: this technique also works well outside on a gas grill where chaff and smoke are less obnoxious.