How To Make An Instant Health Potion Of Healing In Minecraft?

Follow these steps. 

1. Craft one blaze rod and one blaze powder.
2. Now make a crafting table with four planks. You may use any plank type like crimson planks or warped planks.
3. Place this crafting table on the ground and then click it to open the 3×3 crafting grid.
4. Craft the brewing stand and set the blaze rod in the top row in the middle. Then in the second-row place three cobblestones.
5. Next place your brewing stand on the ground and then interact with it to open up the brewing menu.
6. At the far left of the box, set the blaze powder to activate your brewing stand.
7. Now add a water bottle to any of the boxes from the three located at the brewing menu bottom. If you add water bottles to all the bottom boxes, you can make as many as three potions at the same time.
8. To the box located at the brewing menu top, add the nether wart.
9. Wait a while. When the progress bar completes, you will get the awkward potion in your bottle. 
10.  At the box located at the brewing menu top, add the glistering melon.
11. Let your progress bar be complete. After completion, your bottle will have the potion of healing, instant health potion.

Once your potion is ready, add it to your inventory by dragging it down.