I used 2.5 grams of kief collected by sifting my bud through a 125 silk screen. SO it wasn't bubble hash quality but still good, I got pretty retarded.
I dissolved my keif into the oil by heating it in a 30ml jar in a pot of boiling water. I did it this way as to not burn the oil or the thc. Not sure if you can but justed wanted to play it safe.
Afterwards I let the oil sit over night so any veg matter settled to the bottom and I used the good clear stuff on top to add to required amount of oil called for in the recipe. ran the rest of the sludge through a metal coffee filter.