Cupcakes are always a hit at holiday gatherings, but these Christmas Light Cupcakes take things to the next level. They’re fun, colorful, and decorated to look like little strings of holiday lights. You can start with your favorite box mix – whether that’s vanilla, chocolate, red velvet, or something festive like spice cake – and build from there.

Christmas Light Cupcake on white dessert plate.

I made these for a holiday party last year, and they were gone within minutes. Everyone was amazed at how cute they looked, and the kids loved picking out their favorite “light bulb” cupcake. It’s one of those recipes that feels festive without requiring a lot of time to prepare.

If you love holiday sweets, you should also check out my Christmas Tree Cupcakes and Christmas Tree Pops. They’re all perfect for adding cheer to your dessert table.

Three Christmas Light Cupcakes, overhead shot.

Why You’ll Love This Recipe

Festive look that’s perfect for holiday parties.
Easy decorating idea that even beginners can master.
Customizable with your favorite frosting flavors and M&M colors.
Kid-friendly treat that doubles as a fun holiday activity.

Ingredients

Boxed Cupcake Mix: Use your favorite flavor – vanilla, chocolate, red velvet, or spice cake all work well. It’s a quick, foolproof way to get perfectly fluffy cupcakes every time.
Vanilla Frosting: A can of frosting makes things simple and convenient. It’s smooth, creamy, and pipes smoothly.
Black Decorating Icing: Black icing creates the “string” for the lights. The dark contrast makes the colorful candies stand out.
M&Ms: These mimic the bulbs of Christmas lights. Their bright colors give the cupcakes a playful and festive finish.

Substitutions and Additions

Cupcakes: If you prefer baking from scratch, swap a boxed mix for homemade cupcakes.
Frosting: Cream cheese frosting or buttercream both work well if you’d like more flavor depth.
Icing: If you can’t find black icing, mix white frosting with black gel food coloring.
M&Ms: Try using Skittles or jelly beans instead for a slightly different look and taste.

Step by Step Instructions

Bake and Cool the Cupcakes

Prepare your chosen box mix according to the package directions. Bake, then allow the cupcakes to cool completely before decorating.

Frost the Cupcakes

Christmas Light Cupcakes, in process, cupcakes on wire rack with white frosting piped onto cupcake.

Fill a piping bag fitted with a 1A tip with vanilla frosting. Pipe a swirl on top of each cooled cupcake, starting at the outside edge and working your way inward.

Add the Light String

Christmas Light Cupcakes, in process, cupcakes on wire rack with black string lights piped onto the frosting.

Place black decorating icing in a piping bag with a small round tip. Pipe a curved line across the top of the frosted cupcake, looping around as if creating a string of lights.

Attach the Bulbs

Christmas Light Cupcakes, in process, cupcakes on wire rack ready to have string lights piped onto the frosting.

Press 7–8 M&Ms along the piped string. Space them evenly so they resemble glowing bulbs on a strand of lights.

Finish and Serve

Arrange the cupcakes on a platter. Step back and admire how they look like a string of Christmas lights across your dessert table. Enjoy!

Christmas Light Cupcakes, side by side in green and yellow cupcake liners.

Tips and Notes

Cool Cupcakes Completely: Make sure your cupcakes are fully cooled before decorating, otherwise the frosting will melt.
Consistent Pressure: When piping the icing string, apply steady pressure to achieve a smooth, even line.
Pick Bright Colors: Choose a mix of red, green, yellow, and blue M&Ms for the most festive effect.
Use Gel Food Coloring: If you tint your own icing, gel food coloring works better than liquid because it keeps the consistency firm.

Serving Suggestions

Serve at Holiday Parties: Place them on a festive platter for the centerpiece of your dessert table.
Pair with Hot Chocolate: These cupcakes are extra fun with mugs of rich, creamy hot chocolate.
Gift Them in Boxes: Package in clear holiday treat boxes with ribbon for an easy edible gift.
Make it Interactive: Let kids decorate their own cupcakes with M&Ms at a decorating station.

Christmas Light Cupcake in green cupcake liner.

Storage and Reheating Instructions

Store cupcakes in an airtight container at room temperature for up to 2 days.
For longer storage, keep in the refrigerator for up to 5 days.
Freeze undecorated cupcakes for up to 2 months; thaw before frosting.
Avoid microwaving decorated cupcakes, as the M&Ms may melt and discolor.