Creating this Easy Marshmallow Swirl Fudge involves straightforward steps that are easy to follow. Here’s how to do it:

1. Prepare the Pan: Line an 8×8 inch square pan with parchment paper, allowing some overhang for easy removal later.
2. Melt Chocolate: In a medium saucepan over low heat, combine the semi-sweet chocolate chips and sweetened condensed milk. Stir constantly until the chocolate is completely melted and smooth.
3. Add Vanilla: Remove from heat and stir in the vanilla extract until well incorporated.
4. Incorporate Marshmallows: Gently fold the miniature marshmallows into the melted chocolate mixture until evenly distributed.
5. Add Nuts: If using, fold in the chopped nuts for added texture and flavor.
6. Transfer to Pan: Pour the fudge mixture into the prepared pan. Use a spatula to spread it out evenly.
7. Create Swirls: If you’d like, add a handful of extra chocolate chips on top. Using a knife or toothpick, swirl the chocolate chips into the fudge for a decorative touch.
8. Chill: Place the pan in the refrigerator and allow the fudge to chill for at least 2 hours, or until completely set.
9. Remove and Cut: Once firm, lift the fudge out of the pan using the parchment paper overhang. Cut into squares or rectangles.
10. Store: Keep any leftovers in an airtight container at room temperature or in the fridge.

Following these clear steps will help ensure your Easy Marshmallow Swirl Fudge comes out wonderfully every time!