How do you feel after drinking milk or soy milk? The aim of this preliminary study was to find out if it is possible to measure the psychological effects of staple food items using a consumer test (according to DIN 10974), assessing the mental state of the participants. Results of two tests with dairy products and non-dairy milk substitutes, two vegetable tests, and two tests with bakery products are presented and discussed in the context of the further development of a standardized and validated test to measure the effects of food on the human mental state.