Mint julep recipe question?

I recently had my first mint julep and it tasted like heaven in my mouth. I used some good bourbon, sweet n low and mint leaves which I mashed the juice out of. It was kind of a hassle to make several drinks and to have to keep muddling the mint flavor out of the leaves all night so could I just use mint extract from McCormick thats used for cooking? I couldn't find a recipe that called for it so how much would I use if I can even use that?