A measuring system for automatically determining and/or monitoring the quality of a liquid or viscous foodstuff, and comprising - at least one product container for accommodating such a foodstuff therein, - a housing with an interior space for accommodating the product container, - a heating and cooling device for heating and cooling the interior space, and - a control unit for controlling the measuring system, wherein the product container is provided with - a lid with a probe which projects into the product container and is provided with a thermometer, and - a wall, at least part of which is optically transparent, wherein the housing furthermore comprises: - a light source for emitting light through said part of the wall into the product container, and - an optical sensor (25, 32) for registering the light emanating from the product container, furthermore comprising a first measuring device (23, 27, 29) for rheological properties of said foodstuff, in particular a viscosity meter, wherein the control unit is operatively connected to the thermometer, the heating and cooling device, the light source, the optical sensor and the first measuring device, and is configured for: - the heating and cooling device setting a predetermined time-temperature program in the interior space for a time period, and - controlling at least one of the first measuring device, and the light source and optical sensor, for automatically repeatedly performing an associated measurement on said foodstuff in the product container during said time period, for thereby determining a measured value relating to said foodstuff, and for storing and/or exporting and/or processing the measured values. - at least one product container for accommodating such a foodstuff therein, - a housing with an interior space for accommodating the product container, - a heating and cooling device for heating and cooling the interior space, and - a control unit for controlling the measuring system, wherein the product container is provided with - a lid with a probe which projects into the product container and is provided with a thermometer, and - a wall, at least part of which is optically transparent, - a lid with a probe which projects into the product container and is provided with a thermometer, and - a wall, at least part of which is optically transparent, wherein the housing furthermore comprises: - a light source for emitting light through said part of the wall into the product container, and - an optical sensor (25, 32) for registering the light emanating from the product container, furthermore comprising a first measuring device (23, 27, 29) for rheological properties of said foodstuff, in particular a viscosity meter, - a light source for emitting light through said part of the wall into the product container, and - an optical sensor (25, 32) for registering the light emanating from the product container, furthermore comprising a first measuring device (23, 27, 29) for rheological properties of said foodstuff, in particular a viscosity meter, wherein the control unit is operatively connected to the thermometer, the heating and cooling device, the light source, the optical sensor and the first measuring device, and is configured for: - the heating and cooling device setting a predetermined time-temperature program in the interior space for a time period, and - controlling at least one of the first measuring device, and the light source and optical sensor, for automatically repeatedly performing an associated measurement on said foodstuff in the product container during said time period, for thereby determining a measured value relating to said foodstuff, and for storing and/or exporting and/or processing the measured values. - the heating and cooling device setting a predetermined time-temperature program in the interior space for a time period, and - controlling at least one of the first measuring device, and the light source and optical sensor, for automatically repeatedly performing an associated measurement on said foodstuff in the product container during said time period, for thereby determining a measured value relating to said foodstuff, and for storing and/or exporting and/or processing the measured values.