Costco carnitas can be made crispy with a few simple steps: Preheat your oven to 425°F (218°C) and line a baking sheet with parchment paper. Remove the carnitas from their packaging and place them in a single layer on the prepared baking sheet. Place the baking sheet in the preheated oven and bake for 10-15 minutes, or until the carnitas are heated through and the edges are crispy. If desired, you can broil the carnitas for an additional 2-3 minutes to get them even crispier. Once the carnitas are crispy, remove them from the oven and let them cool for a few minutes before serving. Note: It's important to make sure the carnitas are in a single layer on the baking sheet so they can cook evenly and get crispy all around. If they're piled on top of each other, they may not get as crispy. Additionally, you may want to check on the carnitas periodically as they cook to make sure they don't burn.