Do I need raw peanuts or can I use already roasted?
Use raw peanuts for best results. Already roasted peanuts can scorch fast and turn bitter. If all you have is roasted, warm them gently (300°F for 5 minutes) and toss with seasoning instead of re-roasting hard.
Skin-on or skinless peanuts?
Either works. Skin-on gives slightly deeper roast flavor and a bit of rustic bite. Skinless roasts more evenly and takes seasoning very smoothly.
Do you mean shelled peanuts?
Yes: use raw, shelled peanuts (not in-shell). If you only have in-shell peanuts, shell them first and roast the nuts inside.
How do I know they are done?
They will smell toasty and nutty, look a shade darker, and taste crisp after a brief cool. If they taste a little soft right out of the pan, do not panic. Cool 10 minutes, then judge.
Why did my peanuts taste bitter?
Usually they were roasted too long, too hot, or the spices scorched. Peanuts go from “toasty” to “regret” quickly, and delicate powders (like garlic powder and paprika) can burn if they sit in a hot oven too long. Next time, pull the peanuts when they are fragrant and just starting to deepen in color, then toss with spices after roasting (or in the last couple minutes) so they bloom without burning.
Can I make these without oil?
Yes, especially in the oven. The oil mainly helps seasoning cling and adds a touch of richness. For oil-free, roast dry and season with fine salt while hot. If you want spices to stick better, toss with 1 to 2 teaspoons aquafaba (liquid from chickpeas) or a tiny splash of water. Use very little so you do not make the peanuts soggy. You may need a few extra minutes of drying time (often 2 to 5 minutes) depending on how much you add and how crowded the pan is.
How do I remove skins after roasting?
If you used skin-on peanuts and want them smoother, rub the cooled (or just warm) peanuts in a clean kitchen towel. The skins will flake off easily. A few stubborn ones can stay. No one needs perfection here.
Any allergy notes?
Peanuts are a major allergen. If serving guests, ask about allergies and avoid cross-contact (cutting boards, bowls, shared scoopers, and mixed snack trays).