Place the cannabis on parchment paper, and bake at 220-230 for 40 minutes, turning after 20. The cannabis will turn slightly brown.
Remove from oven, remove the stems, and grind up.
Melt the butter in a small pot on low heat.
Add the cannabis to the butter.
Simmer 160-180F for 2-3 hours, stirring occasionally. Do not let it come to a boil
Pour through a cheesecloth, and do not squeeze the cheesecoth.
Pour into silicone molds and chill until solid.
Remove from the molds, gently wipe off any moisture from the bottom.
Place in an airtight container and store for up to 2 weeks in the fridge, 6 months in the freezer.