This thesis focuses on the development of a comprehensive marketing plan for the brand "Chio," with a particular emphasis on the lentil chips product line, within the company Intersnack Adria d.o.o. The theoretical part of the thesis defines the fundamental concepts of marketing planning in detail and highlights their crucial role in achieving business objectives in a modern, challenging, and dynamic business environment. The importance of continuous adaptation, monitoring, and innovation is emphasized to achieve a long-term competitive advantage in the market. The empirical part of the thesis includes a thorough analysis of the market situation and competition, incorporating SWOT analysis and market segmentation to identify the demographic and psychographic characteristics of target consumers. The quantitative research approach, utilizing surveys, enabled precise data collection on consumer habits, product awareness, and perceptions. Based on this data, SMART goals have been set to increase market share and improve the positioning of the lentil chips line. Marketing strategies have been developed, including optimized media plans to enhance product recognition, interest, and attractiveness. The implementation of the proposed marketing plan is considered a key step towards gaining a long-term competitive advantage, increasing sales, and strengthening consumer loyalty. The thesis concludes that successful execution of the strategies and recommendations will enable Intersnack Adria d.o.o. to stand out in the snack market and achieve sustainable growth and success for the "Chio" brand in the future.