Aim: This study sought to investigate the relationship between knowledge and the practical application (including grocery lists, meal plans and food-related pedagogical plans) of Norwegian national guidelines for food and meals in kindergartens, together with the quality of food served in adherence to these guidelines. The study also examined the frequency of daily meals provided and the quality of food served. Moreover, it explored whether pedagogical staff’s knowledge of these guidelines was linked to their practical application. Method: Data were collected from 324 kindergarten staff members by means of a web-based questionnaire distributed to both public and private kindergartens in Norway between 2018 and 2020. Univariate and multivariate linear regression analyses were employed to explore associations between pedagogical staff knowledge of the content of national guidelines and food quality in line with national guidelines. Results: Of the 324 participating kindergartens, two-thirds were private providers and one-third were public. A total of 155 kindergartens were in eastern Norway, 41 in mid-Norway, 50 in the west, 48 in the south and 26 in northern Norway. The study found that pedagogical staff’s knowledge and the use of national guidelines were positively associated with better food quality and adherence to guidelines for food and meals in kindergartens. In addition, the frequency of daily meals provided by kindergartens was associated with food quality. Conclusions: An association was found between pedagogical staff’s knowledge and application of national guidelines for food and meals, and the quality of food served in adherence to these guidelines. In addition, a correlation was observed between the frequency of meals provided by a kindergarten and food quality. These findings suggest that stressing the development of a better understanding of the content of national guidelines for food and meals could potentially enhance food and meal practices in kindergartens, but further research to explore this possibility is warranted.