It is generally not recommended to put a cookie cooling rack in the oven. Cookie cooling racks are designed for cooling baked goods and are not intended for use in the oven. They are typically made of thin metal wires, and the high heat of the oven can cause the wires to warp, melt, or become damaged. Using a cooling rack in the oven can also create a potential fire hazard, especially if the rack is made of materials that are not oven-safe. It is best to use cooling racks only for their intended purpose of cooling cookies and other baked goods after they come out of the oven. If you need a rack for cooking or roasting in the oven, it is better to use an oven-safe rack or a baking sheet with a wire rack set on top. Always check the manufacturer's instructions and guidelines for using any kitchen equipment in the oven to ensure safety and avoid damage.