Step 1

Add pineapple juice, rice vinegar, soy sauce (see notes), and sugar to a sauce pan and whisk together. Set over medium-high heat and bring to a boil.

Step 2

While you're waiting for the sauce to boil, mix together your cornstarch and water to make a slurry.

Step 3

Once the sauce is boiling (big bubbles), add in the cornstarch slurry. Stir until thickened and then remove from heat.

Step 4

Add in your food coloring. Do not add it in before this or it will lose some of it's vibrancy and you'll end up needing more.

Step 5

Let cool at room temperature. Store in refrigerator.