Cannabutter to oil ratio?

I have made my cannabutter, and am now waiting for it to solidify in the fridge... Looking at the cake box, it says to use 1/3 cups of oil. If I'm using cannabutter, how much of the butter should I use? I made 1lb. (4 sticks)

I'm sure you found your answer by now, but oil to butter is 1:1. Just have to melt your butter first if the recipe calls for oil, because the oil is where the mix is getting some of it's moisture from. 1 stick of butter is a 1/2 cup.

Melt it Hot Water, never in the Microwave that fucks it up.