Step 1

Line a 9-inch square pan with parchment paper or aluminum foil.

Step 2

In a large pot over low heat, add the margarine, sugar, and evaporated milk. Bring mixture to a full boil, stirring constantly.

Step 3

Keep boiling for 4 minutes or until the candy thermometer reads 234 degrees Fahrenheit.

Step 4

Remove pot from heat.

Step 5

Add the chocolate marshmallow creme. Stir until melted and incorporated.

Step 6

Stir in the walnuts and vanilla.

Step 7

Transfer the fudge onto the lined pan. Spread evenly with an off-set spatula.

Step 8

Let it sit at room temperature for 4 hours.

Step 9

Slice into 1-inch squares. Enjoy!