Coarsely grind decarboxylated cannabis and combine with Everclear in a small glass jar. Shake or stir well to combine.
Fill a small saucepan to the same level of water as the liquid in your jar and bring to a slow simmer, 170°F.
Add the open jar to the simmering water, using the jar lid or even a small dish towel to keep the jar from touching the bottom of the pot. Simmer for 20 minutes.
Strain the liquid using cheesecloth or a paper coffee filter. Store in an airtight container in a cool, dark place.
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Notes
According to the USDA, alcohol cooked for 15 minutes will still retain 40% of the original alcohol content. It takes at least 3 hours for the alcohol to completely dissipate.