Butter is a solid at room temperature, which gives cookies their structure and tender texture. Oil, on the other hand, is a liquid, which can make cookies more dense and flat. But don't worry, with a few tweaks to the recipe, you can achieve similar results using oil instead of butter.
When substituting oil for butter, use about 3/4 the amount of oil as you would butter. For example, if a recipe calls for 1 cup of butter, use about 3/4 cup of oil. This will help retain the moisture and flavor of the cookies without making them too greasy.
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Some types of oil, like olive oil and avocado oil, have a stronger flavor than others, so use them sparingly. On the other hand, neutral-tasting oils like canola oil and grapeseed oil are better suited for delicate cookie recipes. And if you're feeling adventurous, you can even try using coconut oil for a unique flavor and texture.