This guide explains how to brew a Strong Potion of Acid (Level III effect).
Using this recipe, you can also adjust it to create Level II or Level I potions.
Use this guide to help with your playthrough.

Things to Know
Please review the following points to accurately reproduce the recipes in this guide as intended.
① If no grinding amount is specified, the ingredient should be ground to 100%
② If a percentage is specified, grind the ingredient to that exact value
③ Movement along the outer edge of the Whirlpool is expressed using clock-face directions, such as “Whirlpool 00 o’clock.”
④ Spoon 00 represents the amount of movement caused by Spoon stirring (this value appears only in some cases)
How to Check Grinding Percentage and Stirring Progress During Brewing
After adding a ground ingredient to the Cauldron and stirring it, save the recipe to check in the Recipe Book how far an ingredient ground to X% has moved by Spoon 00.

Only insufficient Spoon stirring can be adjusted afterward, so use this method when necessary.
If you delete the recipe after brewing, nothing will be wasted.
Recipe List
5-Ingredient Recipe [Water Map]
Thornstick (67%)×3 →
Flameweed ×1 →
Thornstick (67%)×1 → Add Base → Spoon → Add BaseA moderately cost-efficient recipe.
It can be a bit busy, as you need to add Base after the final Thornstick is added.
4-Ingredient Recipe [Water Map]
Grave Truffle (36%)×1 →
Grave Truffle (27%)×1 →
Magma Morel ×1 → Whirlpool 10 o’clock →
Sulphur Shelf ×1 → Add Base2-Ingredient Recipe [Wine Map]
Grave Truffle (27%)×1 + Moon Salt ×20 →
Lavaroot ×1 → Add Base → Moon Salt ×280This recipe consumes Moon Salt, but can be completed with just two ingredients.
Related Guides
Here are my other Potion Craft guides. Feel free to check out anything that catches your eye.