As TCH is fat soluble it is best to heat your medical marijuana in some type of fat for a while to extract as much TCH as possible before baking or cooking with it. Three favourite methods to do this are:
- marijuana infused oil 
- cannabutter  (cannabis butter/ghee)
- marijuana leaf flour-butter  (slow-saute).
The following basic techniques are from www.helladelicious.com .
Marijuana Infused Oil
There are a variety of methods for making this oil and various lengths of time suggested for the infusion process. My favourite is using a crock pot on low for around 24 hours. Many people only infuse the oil for 40 minutes to 3 hours and are happy with the results, but I like the longer process for maximum extraction.
Various fats or oils can be used. Do not use highly processed refined vegetable oils such as canola, soy or corn as these oils damage the body and are not helpful when your health is compromised. Do not use cold-pressed oils such as sunflower or flax-seed because heating causes them to oxidize.
Extra virgin olive oil is a good option. Coconut or palm oil are excellent as they are easy to digest, full of immune boosters and anti-oxidants among other things–they are very healing oils in general. Organic sesame, peanut and hemp oils are also good alternatives, but be aware that they have their own flavours which can be incorporated into your dishes very nicely as well. Oils can also be mixed–a peanut-coconut combination might be nice for brownies, for example.
Amounts are not precise and the strength will vary depending on the quality of your ingredients. Here is a general guideline:
- 1 litre or quart of oil or fat
- 1 oz of medical marijuana leaf
Grind up the medical marijuana in a spice or coffee grinder until very fine. Put into a crock pot. Pour over oil until covered and heat on low for about 24 hours. The oil will smell up the house, so I often put mine in a back room.
Strain the oil through a cheesecloth and wring out as much of the oil as you can. You can also cook up oatmeal raisin cookies with the leftover mass.
The oil will keep quite well and can be used in cooking either for meat dishes such as curry or pasta or for baked items such as cakes and brownies. It can also be mixed into a salad dressing.
Variations on this recipe have been around for a while. Basically, keep the temperature of the infusion low. Keep an eye on your butter to make sure it doesn’t boil. If it gets too hot, add an ice cube or cold water to cool it down. Stir it every so often to make sure it isn’t burning.
Use organic butter for your medical marijuana cannabutter as agro-chemicals become concentrated in industrial farmed dairy products. Amounts are variable depending on the quality and quantity of your ingredients, but these are the ratios that are commonly used:
- 1 pound butter
- 2-4 c water
- 1 oz medical marijuana leaf, fine ground
Heat the butter and water in a crock pot so the butter begins to melt. Grind the medical marijuana up into a very fine powder and add it to the crock pot. Turn the pot to low and stir it every so often, make sure it doesn’t boil. If you are using lots of a low quality marijuana you may want to add more water to cover the mixture and evenly heat it.
This mixture should be steeped for 3 or more hours, just be sure it doesn’t get too hot. When you are done, pour it into cheesecloth and allow it to strain, when it has cooled wring it out until as much of the butter is extracted as possible. Place the liquid into the fridge and allow to cool, the butter will separate from the water.
Remove the butter, portion it and freeze it in blocks to keep it fresh.
Medical Marijuana Butter-Leaf Flour
This recipe is developed from Nina’s Basic Medical Marijuana Recipe and is good for people on low-carb or no-grain diets. This method creates a marijuana flour which can be substituted for regular wheat flour in any of your favourite recipes.
- Using a coffee or spice grinder, process the medical marijuana until very fine, like flour. Sift the ground marijuana through a fine sieve and grind any larger particles again. Grind up as much as you need for your recipe.
- Melt 1/4 c butter in an iron skillet or other thick-bottomed pan.
- Add in the marijuana flour and saute on the absolutely lowest heat for at least 40 minutes. Keep stirring the mixture and do not let it burn. If necessary add more butter or add in some water to keep it from sticking. Keep an eye on it and don’t let it burn. Keep the mixture dry but don’t let it stick or it will burn.
After it is cooked allow it to cool and then use it as flour for any recipe.
With these basic methods for preparing medical marijuana for cooking under your belt, the oil, butter or flour can be substituted for many of your favorite recipes.