Line an 8X8 baking dish with foil or parchment paper and spray with a non-stick cooking spray for easy removal of the fudge.
Add the maple syrup to a saucepan and heat over medium high heat. Bring the syrup just to a boil and then reduce the heat to low and simmer for approximately 5 minutes.
Pour in the heavy cream and do not stir it in. Bring the mixture back to a boil and then reduce the heat again and let it simmer for 15-20 minutes until the mixture reaches 236 degrees F based on a candy thermometer.
Remove the pan from the heat. Add in the butter but do not stir in. Let the mixture cool for approximately 10 minutes.
Beat the mixture with a hand held mixer for 5 minutes until the mixture becomes thick and is thoroughly combined.
Pour the mixture into the prepared pan into a single layer. Gently tap the pan on the countertop to remove any air bubbles from the mixture.
Refrigerate until the fudge is fully set (2-3 hours).
Carefully remove the fudge from the pan by lifting the parchment paper or foil.
Dice the fudge into 24 pieces with a large, sharp knife.
Then the fudge is ready to serve and enjoy!