How much canola oil do you substitute for 2 sticks of butter in a cupcake recipe?

Canola oil is a liquid while butter is a solid, so you cannot replace butter with oil on a 1-to-1 ratio. For every 1 cup of butter, you only need 3/4 cup of oil. So if your cupcake recipe calls for two sticks of butter (which is 1 cup of butter), you will need to use 3/4 cup of canola oil.