Learn About Preparing and Cooking Rhubarb

Understanding Rhubarb: What It Is and How to Select It

Rhubarb is a perennial plant that grows in temperate climates around the world. Most people think of it as a fruit, but botanically speaking, rhubarb is actually a vegetable—specifically, it's the edible stalks or petioles of the plant. The stalks are the part you cook and eat, while the large leaves that grow at the top contain oxalic acid and should never be consumed, as they can be toxic in large quantities.

The plant has been cultivated for thousands of years, originating in Asia before spreading to Europe and eventually to North America. It became especially popular in Victorian England and remains a traditional ingredient in many British and Northern European dishes. Today, rhubarb grows commercially in many regions, with the United States, Canada, and parts of Europe being major producers.

When selecting rhubarb at the market or grocery store, look for firm, crisp stalks with good color. Fresh rhubarb should feel solid when you gently squeeze it and should not be limp or soft. The color can range from pale pink to deep red, depending on the variety and how much sun the plant received while growing. Redder rhubarb tends to be more visually appealing in finished dishes, though both red and green varieties taste similar. Stalks should be relatively straight and uniform in thickness, as this makes them easier to prepare and cook evenly.

Rhubarb is typically in season from early spring through early summer, with peak availability in April, May, and June in North America. During these months, you'll find the best quality stalks at the lowest prices. Some regions grow rhubarb year-round in greenhouses, making it available outside the traditional season, though it may cost more. When buying rhubarb, expect to pay somewhere between $1.50 and $3.50 per pound depending on the season and your location. One pound of fresh rhubarb typically yields about two to three cups of chopped stalks after trimming.

Practical Takeaway: Choose firm, colorful stalks without soft spots or wilting. Buy during spring and early summer for the best flavor and price. Plan to use about one-third pound of rhubarb per person for most recipes.

Preparing Rhubarb: Cleaning and Cutting Techniques

Before you can cook with rhubarb, you need to prepare it properly. The first step is always to remove and discard the leaves completely. Cut the leaves away from the stalks using a sharp knife. Do not compost these leaves in your home composting system if you have one, as the oxalic acid content makes them unsuitable for composting in most home setups. Wash the stalks under cool running water and rub them gently with your hands or a soft brush to remove any dirt or debris.

Once the rhubarb is clean and dry, examine the stalks closely. Rhubarb has a thin outer skin that some people prefer to remove and others leave on. If you want to remove the skin, place a stalk on your cutting board and use a vegetable peeler or small sharp knife to peel away the outer layer, working from the base toward the leafy end. This step is optional—many recipes work perfectly well with the skin left on, and it contains beneficial fiber and nutrients. The skin is particularly worth removing if the stalks are very thick or if you're making a delicate sauce where smooth texture is important.

For cutting rhubarb, use a sharp knife and a clean cutting board. Slice the stalks into pieces that match the requirements of your recipe. For most purposes, cutting rhubarb into half-inch to one-inch pieces works well. For pies, jams, and compotes, uniform size helps with even cooking. If you're making a smoothie or blending rhubarb into sauce, you can cut it into larger chunks since the blender will break it down further. Some recipes call for rhubarb to be cut into longer pieces for visual presentation—in these cases, cut the stalks into two to three-inch lengths.

A helpful technique when preparing large amounts of rhubarb is to line up several stalks together on your cutting board and slice them all at once, working quickly and carefully. This batch method saves time when you're preparing rhubarb for preserving or making large quantities of sauce. If you're storing cut rhubarb before cooking it, place the pieces in an airtight container in the refrigerator where they'll keep for three to four days. Some cooks prefer to freeze rhubarb pieces on a baking sheet before transferring them to freezer bags, which preserves them for up to a year.

Practical Takeaway: Always remove and discard leaves. Wash stalks and optionally peel them. Cut into uniform pieces sized for your recipe, and store cut rhubarb in the refrigerator for up to four days or freeze for longer storage.

Basic Cooking Methods: From Stewing to Roasting

Rhubarb is a versatile ingredient that responds well to several different cooking methods. Each method produces slightly different results in terms of texture and flavor intensity, so choosing the right technique depends on what you're making and what final product you want to achieve.

Stewing is perhaps the most common cooking method for rhubarb. To stew rhubarb, place cut pieces in a heavy-bottomed pot or saucepan with a small amount of liquid—water, juice, or a combination—and heat over medium heat. You'll need about one-quarter cup of liquid per pound of rhubarb. Add sugar to taste, stirring well to combine. The rhubarb will begin to release its own juices as it heats. Simmer gently for five to fifteen minutes, depending on how small you cut your pieces and how soft you want them to become. Some cooks prefer rhubarb with a bit of texture remaining, while others like it completely soft and sauce-like. Stewed rhubarb works wonderfully on its own as a sauce, served over yogurt, ice cream, or cake.

Roasting is another excellent method that concentrates flavors and brings out deeper notes in the rhubarb. Toss cut rhubarb pieces with a small amount of oil or butter, sugar, and any seasonings you like—cinnamon and ginger pair particularly well with roasted rhubarb. Spread the pieces on a baking sheet in a single layer and roast at 375 to 400 degrees Fahrenheit for fifteen to twenty minutes, stirring halfway through. Roasted rhubarb develops slightly caramelized edges and a more intense flavor than stewed rhubarb. This method works well when you want rhubarb as a side dish or topping.

Baking rhubarb directly into desserts is another popular approach. Rhubarb pies, crisps, and cobblers all rely on the rhubarb cooking slowly in the oven, where it softens and releases its juices that mingle with other ingredients. In pie fillings, many cooks toss the rhubarb with sugar and sometimes a small amount of cornstarch or tapioca starch to help thicken the juices. For crisps and cobblers, you can use rhubarb alone or combine it with other fruits like strawberries or apples, which adds sweetness and helps balance rhubarb's tartness.

Microwave cooking is a faster method if you want rhubarb sauce in a hurry. Place cut rhubarb in a microwave-safe bowl with a small amount of liquid and sugar, cover loosely, and microwave on high for three to five minutes, stirring once or twice during cooking. The exact time depends on the size of your pieces and the power of your microwave.

Practical Takeaway: Stewing and roasting are the most versatile methods. Stew rhubarb for sauce; roast for concentrated flavor; bake into desserts; or microwave for quick preparation. Most methods take fifteen to twenty minutes.

Balancing Flavors: Sweeteners and Spices That Complement Rhubarb

Rhubarb has a distinctly tart, slightly astringent flavor that requires careful balancing with sweeteners and complementary ingredients. Most rhubarb recipes call for added sugar, though the amount varies depending on personal preference