Marshmallow Swirl Fudge (Easy No-Bake Recipe)
Some recipes look like they took all day, and this Marshmallow Swirl Fudge is one of them. Underneath those pretty white ribbons, it’s one of the easiest candies you’ll ever make: a rich, creamy chocolate fudge base with marshmallow creme swirled through it, set in one pan, and cut into neat little squares. No oven, no candy thermometer, and no standing over a boiling pot.
It’s the kind of treat that disappears from a holiday tray first, fills a gift box beautifully, and takes about 15 minutes of actual work.
Prep Time: 10 minutes | Cook Time: 5 minutes | Chill Time: 2 hours | Total Time: 2 hours 15 minutes | Yield: 36 small squares
Why You’ll Love This Recipe
- No baking, no thermometer. Everything melts together in one pan or bowl — that’s the whole job.
- Only 6 ingredients. Chocolate chips, condensed milk, and marshmallow creme do all the work.
- That swirl. Every square comes out marbled differently, so the whole batch looks handmade and fancy.
- Made for gifting. It packs, stacks, and travels well — a holiday and bake-sale favorite.
- Make it ahead. It keeps well in the fridge, so dessert is ready before guests are.
Marshmallow Swirl Fudge Ingredients
- 3 cups (510 g) semi-sweet chocolate chips
- 1 can (14 oz / 397 g) sweetened condensed milk
- 2 tablespoons butter
- 1 teaspoon vanilla extract
- 1/4 teaspoon salt
- 1 1/2 cups marshmallow creme (marshmallow fluff), about one 7 oz / 200 g jar
Ingredient Notes and Substitutions
- Chocolate chips: Semi-sweet gives the best balance. Dark chocolate makes a richer, less sweet fudge; milk chocolate makes it softer and sweeter.
- Marshmallow creme: This is what swirls. Melted mini marshmallows don’t ribbon the same way, so use the jarred creme/fluff if you can.
- Sweetened condensed milk: Not the same as evaporated milk — the recipe won’t set properly with evaporated milk.
- Butter: Salted or unsalted both work; if you use salted, skip the extra pinch of salt.
- Make it your own: Stir 1/2 cup chopped walnuts or pecans into the chocolate base before swirling.
How to Make Marshmallow Swirl Fudge
Step 1: Line the pan. Line an 8×8-inch pan with parchment paper, leaving an overhang on the sides so you can lift the fudge out later.
Step 2: Melt the chocolate. Add the chocolate chips, sweetened condensed milk, and butter to a medium saucepan over low heat. Stir constantly until completely melted and smooth, 3–5 minutes. (Microwave works too: heat in 30-second bursts, stirring between each.)
Step 3: Flavor it. Remove from the heat and stir in the vanilla and salt. Work fairly quickly from here — the fudge starts to firm up as it cools.
Step 4: Pour. Pour the chocolate mixture into the lined pan and smooth the top with a spatula.
Step 5: Add the marshmallow. Drop the marshmallow creme over the top in spoonfuls, spread across the whole surface.
Step 6: Swirl. Drag a butter knife through the pan in a few figure-eight motions to marble the marshmallow through the chocolate. Stop early — a few passes give bold ribbons; too many and the swirl disappears into the fudge.
Step 7: Chill and cut. Refrigerate at least 2 hours, until firm. Lift the slab out by the parchment, and cut into 36 small squares with a large knife, wiping the blade between cuts for clean edges.
Pro Tips
- Low heat, always. Chocolate scorches fast. Low and slow keeps the fudge glossy and smooth instead of grainy.
- Swirl less than you think. The prettiest fudge in the photos is under-swirled, not over-swirled.
- Warm knife, clean cuts. Run the knife under hot water and wipe it dry before each cut for bakery-style squares.
- Room-temp fluff swirls easier. Take the marshmallow creme out of the fridge (if you store it there) a little ahead of time.
Serving Suggestions
Serve squares on a holiday dessert tray, stack them in small cellophane bags or tins for gifts, or add a square alongside coffee or hot chocolate. A few squares warmed for 5 seconds in the microwave turn soft and gooey again.
Storage
Store in an airtight container with parchment between layers. It keeps 1 week at room temperature or up to 2 weeks in the fridge. Freeze up to 2 months; thaw in the fridge overnight or on the counter for about an hour before serving.
FAQs
Why did my swirl disappear?
Almost always over-swirling. Four or five passes with the knife is plenty — the ribbons should still look like ribbons before chilling.
Can I use mini marshmallows instead of marshmallow creme?
For swirling, creme works far better. Mini marshmallows melt into the base and flavor it, but they won’t hold a visible white ribbon.
Does this fudge need a candy thermometer?
No. The condensed milk sets the fudge without any temperature stages — that’s exactly why this version is so beginner-friendly.
Why is my fudge soft?
It probably needs more chill time, or the chocolate-to-milk ratio changed (extra liquid, low-fat milk). Give it a few more hours in the fridge; it firms up as it cools fully.
Final Thoughts
This Marshmallow Swirl Fudge is proof that a showpiece candy can be a 6-ingredient, no-bake job. Rich chocolate, soft marshmallow ribbons, and squares that look like they came from a candy shop — make a batch for the holidays and watch it go.
Marshmallow Swirl Fudge
Ingredients
Method
- Line an 8×8-inch pan with parchment paper, leaving an overhang on the sides.
- Melt the chocolate chips, sweetened condensed milk, and butter in a saucepan over low heat, stirring constantly until smooth, 3-5 minutes. (Or microwave in 30-second bursts, stirring between each.)
- Remove from the heat and stir in the vanilla and salt.
- Pour the chocolate mixture into the lined pan and smooth the top.
- Drop the marshmallow creme over the top in spoonfuls.
- Drag a butter knife through in a few figure-eight motions to swirl. Do not over-swirl.
- Refrigerate at least 2 hours, until firm.
- Lift out by the parchment and cut into 36 small squares, wiping the knife between cuts.
