Marinade

TL;DR: A marinade is acid + oil + aromatics. It flavors the surface of food but only penetrates 1-2mm deep. Marinate thin cuts for 30 minutes to 2 hours, thick cuts up to overnight. Don't over-marinate in acid or the texture goes mushy.

For years I marinated chicken overnight thinking longer was always better. The result was always the same: the outside turned weirdly soft and chalky while the center tasted the same as unseasoned meat. Once I learned that marinades barely penetrate past the surface, I changed my approach entirely. Shorter times, stronger flavors, and a brine for when I actually need moisture deep in the meat.

A marinade is a seasoned liquid mixture used to soak food before cooking. The three core components are an acid (vinegar, citrus juice, wine, yogurt), a fat (olive oil or another oil), and aromatics (garlic, herbs, spices). The acid denatures surface proteins, the oil carries fat-soluble flavors and helps with browning, and the aromatics provide the actual taste.

How marinades work

The acid in a marinade denatures proteins on the surface of the food. This means the protein molecules unwind and change shape, which can make the surface slightly more tender and allows flavor compounds to cling better. But the effect is shallow. Harold McGee's research shows that most marinades penetrate only 1-2mm even after hours of soaking.

The oil in the marinade does two things. It dissolves and carries fat-soluble flavor compounds (from spices, garlic, chili) that water-based liquids can't transport. It also coats the food surface, which helps with browning and prevents sticking during cooking.

Salt in a marinade behaves differently from the acid. Salt actually penetrates deeper into meat through diffusion, which is why salty marinades season more thoroughly than purely acidic ones. This is also why a brine (which is mostly salt and water) works so much better for deep seasoning.

Marinade vs brine

I use marinades when I want bold surface flavor on something thin, like chicken thighs for the grill or sliced vegetables. I use a brine when I need moisture insurance on lean cuts like chicken breast or pork loin. Sometimes I do both: brine first for moisture, then a quick 30-minute marinade for flavor.

Marinating times by protein

Timing matters. Too short and the flavor doesn't develop. Too long and the acid breaks down the surface texture.

Warning: Acidic marinades will "cook" fish if left too long. This is the principle behind ceviche. If you're marinating fish to grill later, keep it under 30 minutes or use a low-acid marinade (yogurt or oil-based).

A basic all-purpose marinade

Simple All-Purpose Marinade

Yield: Enough for 500g protein Time: 5 minutes

60ml Olive oil

20ml Acid (lemon juice, red wine vinegar, or soy sauce)

3 cloves Garlic minced

1 tsp Salt

1/2 tsp Black pepper

1 tsp Dried herbs or spices (oregano, cumin, paprika)

1

Whisk oil and acid together in a bowl or zip-top bag

2

Add garlic, salt, pepper, and herbs

3

Add the protein, making sure it's fully coated

4

Seal and refrigerate for the recommended time

5

Remove from marinade, pat dry, and cook immediately

Tip: Always pat marinated food dry before cooking. Excess liquid on the surface creates steam instead of browning. You want the Maillard reaction, not steaming. A dry surface sears better.

Safety rules

• Always marinate in the fridge. Leaving marinating meat at room temperature puts it in the bacterial danger zone (4-60C / 40-140F).
• Use non-reactive containers. Metal bowls (especially aluminum) react with acidic marinades and can give food a metallic taste. Glass, ceramic, or zip-top plastic bags work best.
• Don't reuse marinade that touched raw meat unless you boil it for 5 minutes first. Set aside a portion before adding the raw protein if you want to use it as a dipping sauce.
• Never marinate at room temperature, even for short times. The fridge slows bacterial growth while the marinade does its work.