This study embarked on a quest to develop and characterize a microemulsion, harnessing the potent properties of (Corylus avellana) hazelnut oil. The microemulsions were meticulously prepared through the drop-wise titration, where water was introduced into a harmonious blend of surfactants (castor oil ethoxylate 20, 30, 40 moles) and oil. All transparent ternary mixtures born from this union were subjected to scrutiny, their viscosity, type of emulsion, conductivity, and droplet size carefully characterized. To assess their resilience, the microemulsions were subjected to a stressful trial under the centrifugal force of 3000 RPM for 30 minutes. Based on the symphony of results, a phase diagram was meticulously constructed, orchestrating the corresponding volumes of these three components. Oil, surfactant, and water mixtures, ranging from different ratios that yielded stable emulsions at HLB 9.7, 11.7, and 13.1, produced transparent liquid masterpieces. The constructed phase diagram unveiled regions of diverse microemulsion and emulsion types, each with its unique narrative. Intriguingly, the droplet size of freshly prepared mixtures danced within a wider range (67 to 367 nm) before centrifugation stability testing. The major region of the microemulsion was found at HLB 11.7 with the lowest particle size of 67 nm. It was concluded that hazelnut oil could be formulated into a microemulsion at a specific HLB value of the surfactant, unlocking a myriad of possibilities.