Opening a durian comes down to finding the natural seams that run along the outside of the fruit. Every durian has five sections (called lobes) separated by faint lines that run from the stem to the base, where they meet in a star-shaped pattern. A short knife, a bit of leverage, and knowledge of where to cut are all you need.
Check Ripeness Before You Start
A ripe durian is dramatically easier to open than an unripe one. The seams on a fully ripe fruit will sometimes split on their own. Before you grab a knife, run through three quick checks.
First, wiggle the stem. If it moves loosely, the fruit is close to ripe or already there. Second, smell the base of the fruit where the seams converge. A ripe durian has a low, earthy, sulfurous smell, something like fresh-cut grass mixed with scrambled eggs. No smell at all means it’s underripe. An overwhelming smell means it’s past its prime. Third, shake the fruit or tap it gently. A slightly hollow sound means the flesh has softened and pulled away from the shell. If you hear a low rasping noise, almost like a wooden frog toy, the durian is ripe and ready.
What You Need
A thick-bladed knife with a short blade works best. A chef’s knife is too long and flexible. A sturdy paring knife or a cleaver-style knife gives you more control. You’ll also want a towel or thick gloves to hold the spiny shell, and a cutting board or other stable surface to work on.
Find the Star at the Base
Flip the durian so the base faces up (the end opposite the stem). Look for the point where faint lines converge into a five-pointed star shape. These lines are the seams between the fruit’s five lobes. Each seam runs as a shallow depressed line from the base all the way to the top. On some durians the star isn’t perfectly centered on the bottom, so look around the base until you spot where the lines meet.
Open Along the Seams
Insert the tip of your knife into the center of the star, about two to three centimeters deep. You’re not cutting through the shell so much as wedging it apart at its weakest point. If the durian is ripe, you’ll feel the seam give way almost immediately.
Once the knife is in, twist it to pry the shell apart. Work the blade along one of the seam lines, pulling the two sides away from each other with your hands as the crack widens. The shell will split along the natural seam, revealing the creamy pods of flesh inside. Repeat for the remaining sections. A ripe durian typically separates into two or three large pieces this way, each holding one or two pods of fruit nestled against large seeds.
If the seams resist, the fruit may not be fully ripe. You can still open it by cutting deeper along the seam lines, but expect to use more force. Scoring the seam with the knife first, then prying with both thumbs, helps with stubborn fruit.
The Bare-Hands Method for Very Ripe Fruit
If your durian is extremely ripe, you may not need a knife at all. Press your thumbs into the base where the seams meet and push outward. The lobes will crack apart along the natural lines. Street vendors in Southeast Asia often open durians this way in seconds. This only works when the fruit is at peak ripeness or slightly beyond, so don’t force it if the shell doesn’t budge.
Removing the Flesh
Each lobe contains one to three large pods of flesh, each wrapped around a seed. Slide your fingers under a pod and lift it out. The flesh separates easily from the shell when ripe. The seeds are not edible raw, so set them aside. The edible portion has a thick, custard-like texture that ranges from mildly sweet to intensely rich depending on the variety.
Storing Leftover Durian
Durian flesh dries out quickly once exposed to air and the smell spreads fast through a refrigerator. Place any uneaten flesh in an airtight container. In the fridge, it stays good for two to four days. For longer storage, freeze it. Frozen durian keeps well for weeks and many people prefer eating it partially frozen, where it takes on an ice cream-like consistency.