A beverage preparation device is provided comprising a preparation unit for preparing a beverage. The preparation unit is arranged for controllably blending a plurality of ingredients incorporable in the beverage. The device further comprises a control unit for enabling a user to control the preparation unit and that comprises a graphical user interface and a processing unit. The graphical user interface has an operational mode enabling the user to indicate a position in an at least two-dimensional space. Therein a respective value of said at least a first and a second parameter is set in accordance with respective components of the indicated position in respective directions in said space, the respective value of said at least a first and second parameter being dependent on the components of said position in said respective directions in a monotonic manner. Subsequently the processing unit drives the preparation unit in accordance with the formulation specified by the user.
