Start with a medium-sized saucepan placed over medium-high heat. Add the pineapple juice (1 six-ounce can), rice vinegar (¼ cup), brown sugar (½ cup), ketchup (¼ cup), and soy sauce (3 tablespoons). Whisk everything together until well combined.
Allow the mixture to cook for about 1 to 2 minutes, keeping an eye on it. You’ll notice the sugar dissolving completely, and the flavors melding beautifully.
Meanwhile, prepare your cornstarch slurry. In a small bowl, combine water (2 tablespoons) and cornstarch (1 tablespoon). Whisk them together until there are no lumps.
Once the sauce has simmered for a couple of minutes, it’s time to add the cornstarch slurry. Pour it into the saucepan while whisking continuously.
Bring the sauce back to a simmer, then reduce the heat to medium-low. This allows the sauce to bubble gently, thickening without burning.
After about 5 minutes, check the thickness. If it coats the back of your spoon nicely, you know it’s ready. Remove the saucepan from heat and let it cool slightly.
Transfer your Homemade Sweet and Sour Sauce to an airtight container for storage. It’s a great idea to taste it at this stage; you can adjust the flavors if you feel it needs more sweetness or tang.
Once cooled, store the sauce in the refrigerator. It will keep well for up to two weeks, giving you plenty of time to enjoy it in various meals.
Lastly, don’t forget to share your creation with family and friends!