A collapsible bread dough rising box is disclosed that can be assembled for warming bread dough during rising, and then collapsed into a folded middle section held between a top member and bottom for easy transport and storage. The box can be large enough to hold a large mixing bowl or several bread pans. A multi-position switch or thermostat can be used to maintain the internal temperature at a desired value between 80 and 120 degrees Fahrenheit. Ventilation channels can be cooperative with the thermostat. Lights can indicate power on, heater on, desired temperature reached and/or safety mechanism activated. Hinges can connect the top member and the middle member to the bottom, for easy assembly and folding. The box is affordable for home bakers. In preferred embodiments the middle is composed of molded plastic panels and living hinges that snap together, thereby further minimizing the cost.
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