Take your decarboxylated Cannabis and combine with olive oil.
In a sauce pot place olive oil and weed, and cook over very low heat stirring every ten minutes to ensure no burning or sticking at the bottom of the pot. Continue to cook and let oil infuse for 40 minutes. Remove pot from heat and let the cannabis steep in oil for another ten minutes while the oil cools down.
Strain oil through a cheesecloth into a mason jar and use right away or store in fridge for later use.