In a very large pan, melt butter, cream of coconut, and chocolate chips on LOW heat. Stir constantly so it won’t burn.
Once completely melted, remove from heat and pour marshmallows and pecans into the mixture. Stir until everything is completely coated. (This requires muscle, so prepare to get a workout :) )
Line large pyrex dish with wax paper.
Pour all of the fudge mixture onto the wax paper and spread evenly. Cover with aluminum foil and refrigerate for two hours or overnight.
Recipe by Live Run Eat Grow at https://www.liveruneatgrow.com/2012/12/13/rocky-road-fudge/