Yes, you can definitely use olive oil instead of vegetable oil in cookies. However, it’s important to note that the flavor and texture of the cookies may be slightly different. Olive oil has a distinct flavor that can add a unique taste to baked goods. It also has a lower smoke point than vegetable oil, which means it may not withstand high baking temperatures as well. If you decide to use olive oil in your cookies, you may want to choose a light or mild olive oil to minimize the impact on the overall flavor of the cookies. It’s also a good idea to use a smaller amount of olive oil compared to vegetable oil called for in the recipe, as its flavor can be quite strong. Overall, substituting olive oil for vegetable oil in cookies can be a healthy and flavorful choice, but it’s best to experiment and adjust the recipe to suit your personal taste preferences.