This study evaluated the use of orange essential oil (OEO) in conjunction with cow milk (CM) and hazelnut milk (HM) to fortify dulce de leche, due to the increased interest in plant-based foods in recent years. The "dulce de leche" (DL) formed from CM and HM, as well as CM:HM mixing rations of 100:0, 75:25, 50:50, and 25:75, are produced for this purpose and physicochemically characterized. When milk jam samples were made using hazelnut milk and orange essential oil, the values for dry matter, titration acidity, protein, oil, and ash were statistically significant (p<0.05). It was determined that the jams made with various milk combinations and orange essential oil had rheological characteristics with K values between 28.17 and 31.47, n values between 0.21 and 0.33, and R2 values between 0.96-0.99. 5-Hydroxymethylfurfural (HMF) values ranged from 10.04 to 44.65 m/kg, L* values ranged from 35.3-53.2, a* values ranged from -0.84 to -1.11, and b* values ranged from 3.78 to 11.3. The interaction between storage days was found to be statistically significant in terms of texture values (p<0.05). When the sensory evaluation findings were statistically evaluated, the general acceptance scores in the A and C samples were determined to be high.