Underkeep Alchemy: Mana Potion Recipe and Flasks

Two separate full-game player discussions report the same conversion: one Empty Flask and two Minor Mana Potions make a Mana Potion. The developer also explains that empty flasks are crafting ingredients; drinking a potion does not give its flask back. Count that extra flask when deciding whether to combine smaller potions.

The cross-checked mana conversion

These are attributed player reports, not this site's gameplay test. The sources describe the larger mana potion; check the exact item names and quantities in your installed language. This is one checked conversion, not a complete potion or cooking database.

Craft it with the Mortar and Pestle

The original player guide identifies the Mortar and Pestle as the alchemy tool and names the Craft command. To apply the reported formula:

1. Check that you have two Minor Mana Potions and one separate Empty Flask.
2. Decide whether you want to spend the smaller potions and the extra flask before combining them.
3. Use the Mortar and Pestle, select the reported ingredients and choose Craft.
4. Inspect the resulting potion and its tooltip before depending on its recovery effect.

No particular slot order or ingredient-placement shortcut is established by these sources. If the formula does not match your version, keep that mismatch separate from a claim that all alchemy is broken.

Why the flask does not come back

In the original flask discussion, developer sirrobbo explains that the empty flask's cost is part of potion crafting. The request to receive one after drinking was a suggestion, not an announced feature. Do not count an anticipated refund as an ingredient for the next craft.

Is a larger potion automatically better?

No such guarantee follows from this recipe. The separate crafting discussion questions the conversion's value, and its reported recovery range differs from an editorial recipe table. This page therefore does not publish a disputed recovery total or promise that combining improves total mana gained.

Compare your own tooltips and the flask cost first. The player guide and crafting discussion also describe drinking potions as a free action, so potion size alone is not evidence that you save a combat action. Keep smaller potions when their current use is more valuable to your party.

Other ingredient formulas and exact effect ranges remain outside this checked example. Use the potions guide for consumable decisions and the rest-and-food guide for recovery between fights.