There are a few reasons why your oatmeal cookies might be coming out dry: 1. Overbaking: This is the most common culprit. Oatmeal cookies should be chewy, not crispy. Over baking can make them dry and crumbly. 2. Old Oats: Using old oats can result in a drier texture. Ensure you're using fresh oats. 3. Lack of Moisture in Other Ingredients: If your eggs, butter, or brown sugar are not at room temperature, they may not incorporate enough moisture into the dough.