You can't "make" dried sage from rubbed sage in the sense of reversing the process. Rubbed sage is a form of dried sage. It's simply dried sage leaves that have been ground or rubbed into a lighter, fluffier texture. You already have dried sage.
Here's a breakdown:
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Dried Sage: This refers to whole or coarsely crushed dried sage leaves.
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Rubbed Sage: This is dried sage that has been further processed. The leaves have been rubbed until they become a fine, fluffy consistency. Think of it like the difference between dried oregano leaves and ground oregano.
Therefore, the question is essentially asking how to alter the texture of existing dried sage, not create it from rubbed sage.
What if you want a finer consistency than rubbed sage?
If you want an even finer sage powder, you can further process the rubbed sage you already have. Here are a couple of methods:
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Using a Mortar and Pestle: Place small amounts of rubbed sage into a mortar and grind it with a pestle until you reach the desired consistency.
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Using a Spice Grinder: A clean spice grinder (or coffee grinder dedicated to spices) can quickly create a very fine sage powder. Pulse the grinder in short bursts to avoid over-grinding.
Summary
Rubbed sage is dried sage. You cannot "make" dried sage from rubbed sage. If you want a finer texture than rubbed sage, you can further grind it using a mortar and pestle or a spice grinder.
