Is chimichurri spicy?
It can be, but it does not have to be. This version has a mild kick from red pepper flakes. If you want zero heat, skip them. If you want more, add a pinch at a time or use fresh minced red chili.
Can I use cilantro instead of parsley?
Yes. A cilantro chimichurri is delicious, just louder and more citrusy. Do a 50-50 mix of parsley and cilantro if you want a middle ground.
What vinegar is best?
Red wine vinegar is classic in many versions and gives a clean tang. White wine vinegar works too. Apple cider vinegar adds a slight sweetness. In a pinch, use lemon juice for part of the acid.
Do I need a blender?
Nope. Hand-chopped is the move here. A blender can turn it into a green smoothie situation. If you do use a food processor, pulse briefly and stop while it is still chunky.
Why does my chimichurri taste bitter?
Usually it is one of these things: over-processed herbs (blender heat and friction), old or bitter parsley, very peppery extra-virgin olive oil, or too much dried oregano. Keep the herbs chopped, not pureed, stick to the amounts, and make sure your olive oil tastes good on its own.
Can I make chimichurri ahead of time?
Yes, and it is actually better after 10 to 30 minutes because the garlic and oregano mellow into the oil and vinegar. For the brightest green color, make it the same day.
Why does it separate?
Totally normal. Chimichurri is not a mayo-style emulsion, so the oil and vinegar will settle and separate. Just stir before serving.
Can I use it as a marinade?
Yes. Marinate chicken thighs for 30 to 60 minutes. Food safety note: if the sauce touches raw meat, do not reuse it for serving. Set some aside first.