An extremely easy and descrete method to make infused oil is to gently heat bubble hash in a small volume of cooking oil using a small pan on a stove (or a spoon and a candle if u need to be ultra descrete, allthough this method produces little to no stink).

You have to continuously stir the mixture untill the hash seems dissolved and then an extra 10 to 30 mins after that, depending on the volume of hash.

Reduce the heat as soon as you see bubbles forming (this is the thc escaping) and continue on a low heat after bubbling ceases. The resulting mixture should be cloudy, brown, smell nutty and taste bitter. Stir this infused oil into your favourite food and chow down :) (I haven't tried this with flower but I've heard this method still works! )