If you have soft biscuits that you'd like to make crispy again, you can follow these steps:
Preheat the oven: Preheat your oven to a moderate temperature, around 350°F (175°C).
Arrange the biscuits: Place the soft biscuits on a baking sheet or a wire rack lined with parchment paper. Make sure to space them apart so that the hot air can circulate around them.
Reheat in the oven: Put the biscuits in the preheated oven and let them bake for a few minutes. The exact time will depend on the size and thickness of the biscuits, but start with around 5 minutes.
Monitor the process: Keep a close eye on the biscuits as they reheat. Check them periodically to avoid overcooking. You want them to become crispy but not burned.
Remove and cool: Once the biscuits have achieved the desired crispiness, take them out of the oven and let them cool on a wire rack. As they cool, they will continue to firm up.
Note: If your biscuits have any fillings or toppings that might not withstand the heat, consider removing them before reheating. For example, if you have cream-filled biscuits, you may want to scrape out the filling and reassemble them after they've crisped up.
By following these steps, you should be able to restore some of the crispiness to your soft biscuits. However, it's important to note that the texture might not be exactly the same as when the biscuits were freshly baked.