Rendering chicken fat from skin is simple: chop the skin into small pieces, cook it low and slow with a splash of water, and strain out the solids once the liquid fat is clear and golden. The whole process takes about an hour on the stovetop and yields a richly flavored cooking fat known as schmaltz. One pound of raw chicken skin produces roughly a quarter to half its weight in pure fat, depending on your method.
What You Need to Start
Save chicken skin every time you break down a whole bird or buy skin-on cuts. Raw chicken skin contains about 20 to 30 percent fat by weight, so you’ll want to accumulate a decent amount before rendering. Toss scraps into a freezer bag and collect them over a few weeks until you have at least a pound. Any visible chunks of fat trimmed from around the cavity or thighs can go in too.
Before cooking, let frozen skin thaw in the refrigerator, then chop it into pieces roughly half an inch square. Smaller pieces expose more surface area, which lets the fat melt out faster and more completely. You’ll also need a heavy-bottomed saucepan or skillet (nonstick works well), a fine-mesh strainer, and a clean glass jar for storage.
The Stovetop Method, Step by Step
Place the chopped skin in your pan and add about a quarter cup of water per pound of skin. The water serves an important purpose: it keeps the temperature low at the start, preventing the skin from scorching before the fat has a chance to melt out. Bring the pan to a simmer over high heat, then immediately drop the burner to low.
From here, patience is everything. Let the skin cook gently, stirring every ten minutes or so. You’ll notice the water gradually evaporating and clear liquid fat pooling in the pan. The transition from water-phase cooking to fat-phase cooking is the moment to watch closely. Once the water has cooked off, the temperature of the fat rises, and the skin pieces will start to brown. If the fat itself turns dark, your heat is too high.
The rendering is done when the skin pieces have shrunk significantly and turned golden brown, and the liquid in the pan is a clear, warm yellow. This typically takes 45 to 60 minutes. Strain the fat through a fine-mesh strainer (a layer of cheesecloth catches finer particles) into a heat-safe glass jar. Let it cool slightly before sealing.
Don’t Throw Away the Crispy Bits
Those golden, shrunken pieces of skin left in your strainer are called gribenes, a traditional Jewish snack that’s essentially chicken cracklings. If they’re not as crispy as you’d like, return them to the skillet and cook over high heat for another minute or two until they’re deeply browned and crunchy. Toss with a pinch of salt and eat them as a snack, crumble them over salads, or scatter them on mashed potatoes. Some recipes call for adding sliced onions during the last 45 to 60 minutes of rendering so the onions caramelize alongside the skin, producing even more flavorful gribenes.
Why the Dry Method Yields More Fat
The stovetop water method described above is the most forgiving approach, but it actually produces the lowest yield, roughly 25 percent of the skin’s starting weight. Dry methods like oven rendering at around 300°F give you closer to 30 percent. Microwave rendering produces the highest yields in lab testing, nearly 48 percent, though it’s harder to control in a home kitchen.
The tradeoff is quality. Water-cooked fat retains slightly more moisture, which can shorten its shelf life. Dry-rendered fat comes out lighter in color and slightly more neutral in flavor. For most home cooks, the stovetop water method strikes the best balance: it’s low risk, produces clean-tasting fat, and the small difference in yield isn’t worth worrying about when you’re working with a pound or two of skin.
Storing Schmaltz Safely
Properly rendered schmaltz keeps in the refrigerator for several weeks and in the freezer for months. The key to longevity is cooking out as much moisture as possible. You’ll know the moisture is gone when the fat stops bubbling quietly in the pan. Any residual water trapped in the fat accelerates spoilage.
Store it in a sealed glass jar, leaving as little headspace as possible. In the fridge, schmaltz solidifies to a pale, creamy spread. In the freezer, consider using ice cube trays to freeze it in tablespoon-sized portions, then transfer the cubes to a freezer bag for easy use. If your schmaltz ever develops an off smell, looks noticeably discolored, or tastes sour or painty, it has gone rancid and should be discarded.
Cooking With Schmaltz
Schmaltz has a smoke point of about 375°F (190°C), which puts it in the same range as common vegetable oils and makes it suitable for sautéing, pan-frying, and roasting. Its fatty acid profile is roughly 40 percent monounsaturated fat, similar to olive oil, with the remainder split between saturated and polyunsaturated fats.
Where schmaltz really shines is in dishes that benefit from savory, rich depth. Roasted potatoes cooked in schmaltz develop an exceptionally crisp crust with a subtle meatiness that butter can’t replicate. Cornbread made with melted schmaltz instead of butter or oil has the same tender crumb and crunchy edges, plus an extra layer of savory flavor. It works beautifully in biscuit dough, tortillas, and pie crusts for savory pies.
Some less obvious uses: warm schmaltz with minced garlic and a pinch of salt becomes a dipping sauce for crusty bread. Melted schmaltz stands in for bacon fat in warm salad dressings. Frying bread in a few teaspoons of schmaltz produces a golden, deeply flavored toast that makes a perfect base for a fried egg. You can substitute it one-to-one for butter, lard, or oil in almost any savory recipe.
Tips for Cleaner, Better Results
- Keep it low. Rendering is not frying. If the skin is sizzling aggressively, your heat is too high. A gentle, intermittent bubble is what you’re after.
- Chop small. Half-inch pieces render more completely than large strips. Some cooks even pulse the skin briefly in a food processor while it’s still cold.
- Strain twice if needed. Tiny protein particles left in the fat will settle at the bottom of your jar and can cause off-flavors over time. A second pass through cheesecloth catches what the strainer misses.
- Mix skin types freely. Breast skin, thigh skin, and trimmed fat all work. Thigh and back skin tend to carry more fat per piece.
- Avoid seasoned skin. If you’ve already salted or marinated the skin, the rendered fat will carry those flavors, which limits how you can use it later.