The Complete Guide to Cooking with Fats
The different types, smoke points, and what to look for in the store.
Fats are a foundational cooking ingredient that can transform and amplify the foods we eat. Depending on what type we use, whether it be olive oil or rendered bacon fat, this ingredient brings out a dish's delicious and textured potential. As chef and author Samin Nosrat writes in Salt, Fat, Acid Heat, "food can only ever be as delicious as the fat with which it's cooked."
The nuanced aspect of fat brings up a critical point: Not all fats are created equal. There are various sources, which range from animal fats to oils extracted from nuts and seeds. Each one boasts its own flavor profiles, effect on the taste of a dish, health aspects, and smoke points. It's incredible just how nuanced and varied fats are. To that end, we've outlined our top picks for the best fats to cook with and how to use each one when making a dish.
What Is Fat?
Water, carbohydrates, protein, and fat. These are the four essential building blocks of all foods. Fats are made up of triglycerides, which are collections of molecules. When this collection comes in a liquid form, we normally refer to it as oil. When it comes in a solid form, we usually refer to it as fat. We will use the terms fat and oil interchangeably in this guide.
Fat is critical to our health and survival. Contrary to what many diets in the 1990s posited, fat is good for us when we choose the healthiest versions. The essential benefits of fats are wide and varied. They aid our body in absorbing vitamins, nourish our cognitive abilities, and support our immune system—among many other things.
(Note: When in question, always check with a medical professional before consuming different, more, or fewer fats.)
What Are the Types of Fats?
The main building blocks of fat are called fatty acids. Generally, a fatty acid consists of a "chain" of carbon and hydrogen atoms.
There are three basic types of fats: saturated, monounsaturated, and polyunsaturated. What makes these three different depends on the number of carbon atoms on the chain.
Saturated fats all have carbon atoms that have bonded with hydrogen atoms. In general, saturated fats are stable fats that are most often solid at room temperature. This makes them a great option for cooking at high heat, as their smoke point is often higher than others.
Monounsaturated fats have one set of bonded carbon atoms, so it's carbon to carbon rather than carbon to hydrogen. Monounsaturated fats are less stable against high heat, so they're best to cook at lower temperatures or used in other ways. These are almost always liquid at room temperature.
Polyunsaturated fats have two (or more) carbon sets that have bonded together, so it's a carbon double bond rather than a carbon to a hydrogen atom bond. Because these oils tend to be unstable, they're best used as dressings and toppers rather than cooking oils. These are liquid at room temperature.
Why Fats Are Essential in Cooking
Fats (this includes fats and oils) serve two primary purposes in cooking: as a topping or seasoning (think olive oil drizzled over fresh greens) and as a cooking medium. For this guide, we'll be focusing on fats used as a cooking medium. When heated, fat becomes an incredible source to crisp up proteins and cook fresh vegetables.
What Is a Smoke Point?
The actual molecular makeup of a fat or oil varies with each type. For this reason, every fat responds differently to heat. The term "smoke point" (also called "burn point") is the literal temperature at which a certain fat or oil starts to break down and smoke. For instance, when cooking with olive oil, you'll notice the oil shimmering when getting hot, and then smoke will appear. That moment and temperature is the smoke point.
Smoke points vary, typically ranging from around 300°F to 500°F. The flavor and health value can decline when fat or oil starts to smoke. Therefore, using oil with a higher smoke point (keep reading) is important when sautéing, frying, and doing other high-heat cooking. Saturated fats tend to have the highest smoke points.
The Best Fats to Cook In
The best oils to cook with are saturated and have a higher smoke point. What you're cooking will mandate which oil best complements the dish and your needs. Here are our favorite fats and oils to cook with at PrimaFoodie:
Clean Animal Fats, such as Duck Fat
Fat Type: Saturated
Animal fats are Nichole's go-to for cooking. That's because they are shelf stable (solid at room temperature) and thus won't turn rancid quickly, have a higher smoke point, and lend a rich, distinct flavor to a dish. Animal fats are incredible for frying up vegetables and potatoes. After cooking bacon on the weekends, Nichole saves the grease and "bits and pieces" to store in the fridge for later use. Duck fat, in particular, lends incredible flavor.
Smoke Point: Ranges from 375 °F to 390 °F
Ghee
Fat Type: Saturated
Also known as clarified butter, ghee is an excellent fat to cook in at higher temperatures. It's also a baking hero.
Smoke Point: Around 485 °F
Olive Oil
Fat Type: Monounsaturated
An Italian staple, olive oil has a rich, nutty flavor profile. It's a monounsaturated fat with a lower smoke point, making it a better oil to cook with at lower heat (no frying) to avoid smoking.
Smoke Point: Around 325 °F to 350 °F
Butter
Fat Type: Saturated
Butter lends a coveted flavor, which is why it's still a favorite in the kitchen—including one of ours. Plus, this animal fat is great for higher heat and has a high water content that adds an additional cooking benefit.
Smoke Point: 350 °F
Avocado Oil
Fat Type: Monounsaturated
Avocado oil is a light, multi-use cooking oil that is nutritious and has a higher smoking point. Great for cooking vegetables and potatoes quickly in high heat.
Smoke Point: Around 500 °F to 520 °F
Coconut Oil:
Fat Type: Saturated
Another PrimaFoodie favorite (and a mainstay in my kitchen) for its shelf stability. The only potential downside of coconut oil is that it has a distinct flavor that isn't for everyone or every dish.
Smoke Point: Around 350 °F for unrefined; 400 °F for refined
Buying and Storing Fats and Oils: What to Look for
Fats are one of the most critical kitchen staples to invest in—so focus on quality. This means buying fats and oils from purveyors dedicated to sustainable and organic practices. Because toxins are stored in fats, you want to choose them from sources that haven't been sprayed with pesticides or fed or injected with antibiotics.
Be sure to store your cooking fats and oils in an airtight container and away from direct heat and light, and aim to replace them at least once a year, ideally every six months. Look at the harvest date, NOT the expiration date, as this tells you when the oil or fat was harvested, offering the most accurate idea of its shelf life. Fats and oils become rancid after sitting for too long due to oxidation from oxygen and heat. Besides having a horrible taste and smell, rancid oils are terrible for our health. Studies have linked the consumption of rancid oils to free radical damage, inflammation, and digestion issues. (Note: Due to their higher levels of polyunsaturated fats, oils from vegetable sources, like olives and almonds, tend to go rancid faster than fats derived from animals.) So keep your oils fresh!