A compact and low-cost mixing faucet for liquids of different temperatures is proposed that allows fine and accurate adjustment of the volume and temperature of the mixed outflow by single-handed operation. The mixing faucet is suitable for use of a ceramic perforated plate and/or thermostatic mixing valve. The actuation quantities can be converted by torque converters to rotational control variables in an ergonomically optimum type, magnitude and/or positioning of movement, such that both rotational control variables can be selectively adjusted when manually operated by accessing from a permanent direction of access. The hand position enables actuation of the faucet with only two fingertips, with torque limitable up to any degree of smoothness and a large angle of rotation at the associated rotary actuator. The rotational control variable for the outflow volume can be made ergonomically easier to reach and adjust from the direction of access.