Step 1

Add the butter to a large saucepan and melt on medium high heat.

Step 2

Next, add the sugar, maple syrup, and sweetened condensed milk and mix well.

Step 3

Bring the ingredients to a full rolling boil, place the thermometer in the pan, and cook until the mixture reaches 234-degrees.

Step 4

Take the saucepan off the burner and mix in the marshmallow cream until it melts.

Step 5

Add the white chocolate chips and mix until melted.

Step 6

Next, add the vanilla extract and mix.

Step 7

Finally, add the chopped walnuts and mix well. Pour into a 9" x 13" inch casserole dish lined with parchment paper.

Step 8

Sprinkle some more walnuts on top of fudge and allow the fudge to set up for at least two hours.