Marshmallow Buttercream Frosting: The Ultimate Fluffy Swirl Recipe
This Marshmallow Buttercream Frosting is a luscious, fluffy swirl of sweet marshmallow fluff and creamy butter, perfect for decorating cupcakes or cakes. With a light, airy texture and a subtle vanilla hint, it offers a delightful balance of sweetness and richness, garnished with mini marshmallows for added charm.
- Prep Time: 5 minutes
- Cook Time: 10 minutes
- Total Time: 15 minutes
- Yield: 24 servings 1x
- Category: Frosting
- Method: No-Cook
- Cuisine: American
Ingredients
Scale
Frosting
- 1 cup Unsalted Butter (227g, softened to room temperature)
- 7 oz Marshmallow Fluff (198g, one standard jar)
- 3–4 cups Powdered Sugar (375g-500g, sifted)
- 1 tsp Vanilla Extract (5ml, pure)
- 1 pinch Fine Sea Salt (to balance sweetness)
- 1–2 tbsp Heavy Cream (15-30ml, as needed for consistency)
Garnish
- 3 mini marshmallows per cupcake
Instructions
- Preparation: Ensure the butter is softened to room temperature to make creaming easier and achieve a smooth frosting texture.
- Cream Butter: Beat the softened butter on medium-high speed for 3-5 minutes until it becomes pale and fluffy—this helps incorporate air for a light frosting.
- Add Fluff: Switch to a whisk attachment and add the marshmallow fluff. Beat until the mixture is smooth and semi-glossy.
- Incorporate Sugar: Gradually add sifted powdered sugar on low speed to avoid a sugar cloud, mixing until just combined.
- Whip to Volume: Add vanilla extract, fine sea salt, and heavy cream. Whip on high speed for 2 minutes until the frosting is dense, airy, and forms soft peaks.
- Decorate: Pipe tall swirls onto cupcakes using a piping bag, then gently press three mini marshmallows into the side of each frosting swirl for decoration.
Notes
- Adjust powdered sugar amount based on desired sweetness and consistency.
- Use room temperature butter for best results.
- Heavy cream helps adjust frosting consistency; add slowly to avoid thinning too much.
- Store leftover frosting covered in the refrigerator and bring to room temperature before use.
- Can be used on cakes as well as cupcakes.
Keywords: Marshmallow Buttercream, Frosting, Cupcake Frosting, Sweet Frosting, Fluffy Buttercream, Marshmallow Fluff Frosting
