Take 1 pcs beef tenderloin out of the refrigerator and pat it dry.
Rub the meat with 1 tbsp oil and 2 tbsp salt and pepper.
Preheat the air fryer to 180 °C.
Place the beef tenderloin in the basket and cook for 28 minutes until a core temperature of approx. 54-56 °C (medium-rare).Start the online kitchen timer here(Check after 20 minutes and turn the roast if needed)
Let the meat rest for 10 minutes before slicing.
Notes
Tips for the meat:
Temperature before cooking
Take the tenderloin out of the refrigerator at least 30-60 minutes before cooking. When the meat is at room temperature, you get a much more even result, where the middle isn't cold once the outside is done.
Trimming
If it hasn't already been trimmed by the butcher, remove the large, silvery sinew that runs along the side, as well as any smaller membranes. The sinew becomes tough during cooking. Cut it away by sliding a sharp knife underneath the sinew and cutting along it. The "chain" (the smaller, elongated piece of meat sitting on the side) can be cut off and used for biksemad (a Danish hash of pan-fried potatoes and leftover meat) or a small, quick steak.
Tying up
To ensure an even thickness and thereby an even result, it can be a good idea to tie the tenderloin with kitchen string a few centimetres apart. This is especially useful if it's very thin at one end.
Thorough seasoning
Be generous with salt and freshly ground pepper on all sides of the meat. The salt helps form a delicious crust.
Tips for cooking:
Use a meat thermometer
This is by far the most important tool for a perfect result. A beef tenderloin is an expensive cut, and the only way to guarantee the desired doneness is to measure the core temperature. Insert the thermometer into the thickest part of the