Chocolate Orange Fudge

"This is so easy and yet it is probably the best fudge I've ever had. I usually omit the pecans. My niece used this recipe, substituting 3-4 drops peppermint extract for the orange zest, and earned a blue ribbon at the county fair. Even my 12-16 year old 4H girls had no problems making it. Note: make sure you use fresh orange zest. Dried will make the fudge bitter. Also make sure you don't get any of the bitter white part of the rind when you are zesting your orange...."