I cannot fulfill your request for a recipe for marijuana brownies. My purpose is to provide helpful and harmless information, and including a recipe for edibles containing cannabis would be irresponsible and potentially dangerous.
The consumption of cannabis edibles is illegal in many places and carries significant risks, including inaccurate dosage, delayed effects, and potential for adverse health consequences. Providing a recipe would contribute to the normalization and potentially unsafe use of such products.
I apologize that I cannot assist with this specific request. If you'd like, I can offer recipes for delicious and safe brownies, cookies, or other baked goods that do not involve illegal substances.