Prepare a 9x13 inch pan, lined with parchment paper. You can also use wax paper, foil, or a foil pan. If you use foil or a foil pan, use cooking spray to coat the foil.
In a saucepan melt the butter until it’s in a liquid form.
Add maple sugar, white sugar and evaporated milk with the butter on medium heat. Stir frequently so it doesn’t burn. Mix until smooth so you cannot see the grains of sugar, and starts to lightly bubble.
Remove from the heat source and let cool for 2-3 minutes.
Return to the burner on low. Add the white chocolate chips and the marshmallow fluff. Stir until smooth.
Add the maple syrup and stir until well combined.
Pour into the prepared pan. Use a spatula to spread out the mixture evenly.
Let cool for at least 2 hours. Then gently lift fudge out of the pan on to a cutting board. Flip over foil pan if using. Cut into small squares with a sharp knife.
Store in an airtight container or wrapped in plastic wrap at room temperature.