Fresh potato wedges and a bag of frozen oven chips do not need the same treatment. Before reaching for the oil bottle, check whether the food already contains oil and what its cooking instructions say. That is a better starting point than adding a spoonful to everything.
Use the quantity specified by a suitable recipe or your appliance instructions. Fresh ingredients may benefit from a light, even coating; pre-fried frozen chips usually need no extra oil. Add oil to the food before loading it, never pour it into the empty air-fryer pan. There is no single spoonful-per-basket rule for every food and model.
Fresh food: coat it before filling the basket
Philips recommends applying oil directly to fresh ingredients when it is wanted for texture and flavour. For homemade chips, its method coats dried potato pieces in a separate bowl, then transfers them to the basket without tipping in the oil left behind.
Set out the bowl, measured oil and utensils before loading the drawer. Toss the pieces, then turn a few over to check the coating reaches both sides. If the recipe gives a weight of potatoes, weigh your portion too: a quantity written for one serving is not automatically enough for a family batch.
Frozen food: read the packet before adding more
Philips says pre-fried foods, including frozen French fries, do not need additional oil. That does not mean every frozen product is pre-fried. Check the ingredients and the cooking directions on your own packet.
Keep the packet nearby until dinner is ready. It gives you something concrete to check if the result disappoints. Write down the product name alongside any timing adjustment rather than treating all frozen chips as interchangeable.
For packet directions and cooking methods, see our guide to frozen food in an air fryer.
Smart tipMeasure the recipe quantity into a spoon first. It is easier to repeat a good result when you know how much you used than when you pour straight from a large bottle.
Why a universal teaspoon rule is unhelpful
A recipe quantity belongs with its ingredient weight, preparation and method. Start with those details instead of matching an amount to the litre capacity printed on your air fryer. A large drawer can still contain a small portion.
For your next batch, note the food weight, oil quantity and result together. Change one thing at a time. If you change the portion, temperature and oil all at once, you will have little idea which adjustment helped.
Keep oil out of the empty pan
An air fryer is not a deep-fat fryer. Philips explicitly warns against pouring oil into its pan, and its manual tells users not to fill the pan with oil or frying fat. Follow the instructions for your own model and use a cooking oil suitable for the recipe temperature.
If the food is still disappointing, check the portion size and method before automatically adding more oil. Keep your notes with the recipe so the next attempt starts from the same setup.
Check the arrangement with our guide to how full to fill an air fryer.
Air fryers vary in power and basket design. Use these timings as a starting point and follow your manufacturer’s instructions where they differ.
Frequently asked questions
Do frozen chips need extra oil?
Pre-fried frozen chips usually do not. Follow the directions on the exact packet; frozen raw potatoes and pre-fried chips are different products.
Should I put oil under the crisper plate?
Do not pour oil into the empty pan. Add any oil required by the recipe to the ingredients and follow your appliance manual.
How do I work out the right amount next time?
Record the recipe quantity and food weight together, then note the result. Keep other settings the same when trying an adjustment.
Sources and further reading
Safety, appliance and recipe guidance was checked against the following sources. Always follow the instructions for your own model.
