Cookies are one of the food products that are popular with the public. The raw material for making cookies is wheat flour, which is still imported from abroad and year by year the number of imports from abroad continues to increase. Utilization of avocado seed flour will reduce the use of wheat flour and can also reduce waste from avocados. The main factor in fulfilling the quality of a product can be assessed based on the appearance of the product, the taste of the product, and the nutritional value of a product. This study aims to analysed the level of preference (taste, aroma, texture, and colour) of cookies through organoleptic tests. The design of this study used an experimental study using the RAL (Completely Randomized Design) method with two replications. Avocado seed flour substitution formulation in 4 treatments, namely control (P1), 30% (P2), 50% (P3) and 70% (P4). The research location is at the State University of Medan. The subjects (untrained panellists) of this study were 25 people. The data from the organoleptic test were analysed descriptively using the percentage of respondents' acceptance from each treatment level and to determine the effect of avocado seed flour substitution on the treatment, Kruskal Wallis statistical analysis was used. The results of this study indicate that the best formula for cookies with 50 percent substitution of avocado seed flour obtained an average value of 1.2 for taste, 0.3 for colour, 0.6 for texture, and for aroma 0.3 with a total value of 2, 4. Based on the results of the Kruskal Wallis test, it is known that there is a significant difference in perception seen from the level of preference for colour, aroma, taste, and texture of avocado seed flour cookies (p = 0.000).

Penelitian ini bertujuan untuk : 1). Menganalisis tingkat kesukaan (rasa, aroma, tekstur, dan warna) cookies dengan penambahan tepung biji alpukat sebanyak 30 persen, 50 persen, dan 70 persen; 2). Menganalisis formula terbaik pada cookies tepung biji alpukat; 3). Menganalisis kandungan gizi (kadar protein, lemak, dan karbohidrat) pada produk terbaik cookies tepung biji alpukat. Lokasi penelitian di Universitas Negeri Medan dan Laboratorium Balai Riset dan Standarisasi Industri Medan. Subjek (panelis) penelitian ini berjumlah 25 orang. Data hasil uji organoleptik dianalisis secara deskriptif dengan menggunakan persentase penerimaan responden dari masing-masing taraf perlakuan. Untuk mengetahui pengaruh subtitusi tepung biji alpukat terhadap perlakuan digunakan analisis statistik Kruskal Wallis. Hasil penelitian ini menunjukkan bahwa formula terbaik pada cookies dengan substitusi tepung biji alpukat sebesar 50 persen diperoleh rerata nilai 1,2 untuk rasa, 0,3 untuk warna, 0,6 untuk tekstur, dan untuk aroma 0,3 dengan total nilai keseluruhan 2,4. Berdasarkan hasil uji Kruskal Wallis diketahui bahwa terdapat perbedaan persepsi secara nyata dilihat dari tingkat kesukaan warna, aroma, rasa, dan tekstur cookies tepung biji alpukat (p=0,000). Kandungan gizi cookies dengan substitusi tepung biji alpukat 50 persen diperoleh kadar karbohidrat (53,9%),kadar protein (7,25%), karbohidrat (29,473%) sesuai dengan ketentuan SNI No. 2973-2011.Kata Kunci : Uji Organoleptik, Cookies, Tepung biji alpukat