Eggnog Cupcakes with Spiced Rum Buttercream Filling

If you love eggnog at the holidays, these eggnog cupcakes will put a smile on your face. They capture everything you love about eggnog — creamy texture, warm nutmeg, and sweet vanilla — transformed into tender cupcakes topped with eggnog buttercream.

Perfect for Christmas parties or any time you want to make cupcakes more festive, the eggnog flavor is present in both the cake and the frosting so each bite tastes like the classic holiday drink.

I make these often when hosting holiday gatherings — the aroma of nutmeg while they bake fills the house with Christmas cheer. I keep the ingredients on hand in December so I can whip up a batch when family visits. We usually grate a little extra nutmeg on top, and sometimes decorate with red and green sprinkles or tiny gingerbread decorations for fun. A few cupcakes also freeze well, so I save some for quick desserts or surprise treats.

The buttercream is what elevates these cupcakes. It’s light and silky, and the eggnog flavor really stands out. I usually make extra frosting because it’s hard not to sneak a spoonful while decorating.

Ingredient Notes

See the recipe card below for exact measurements and full instructions.

• Flour: Use regular all-purpose flour and measure by spooning into the cup and leveling off.
• Butter: Salted butter works well in the cake and frosting. Bring to room temperature for easy creaming.
• Eggnog: Store-bought eggnog is fine; full-fat yields the best flavor and texture.
• Nutmeg: Freshly grated nutmeg is ideal, but pre-ground nutmeg is an easy substitute.
• Vegetable oil: Helps keep cupcakes moist; canola oil is a good alternative.
• Powdered sugar: Gives the frosting a smooth texture — sift if lumpy.
• Vanilla extract: A touch brings out the other flavors.

How To Make Eggnog Cupcakes

Preheat the oven to 350°F (175°C). Line a 12-cup muffin pan with paper liners and spray lightly with nonstick spray.

Whisk together the flour, baking powder, salt, and nutmeg in a medium bowl. In a separate large bowl, beat the room-temperature butter, granulated sugar, and oil until light and fluffy, about 3 minutes. Add the eggs one at a time, beating after each, then add the vanilla.

Alternate adding the dry ingredients and the eggnog to the butter mixture, beginning and ending with the dry ingredients. Mix just until combined — avoid overmixing.

Scoop the batter into liners just over halfway. Bake 18–20 minutes, or until a toothpick inserted into the center comes out clean. Transfer to a wire rack and let cool completely before frosting.

For the eggnog buttercream, beat the butter until fluffy. Add half the powdered sugar and mix, then add the eggnog, vanilla, salt, and nutmeg. Add the remaining powdered sugar and beat until smooth and creamy. Adjust consistency with a splash more eggnog if it’s too thick, or more powdered sugar if too thin.

When cupcakes are completely cool, frost them using a piping bag or a knife. Finish with a light dusting of nutmeg or festive sprinkles if desired.

Make-Ahead, Storing and Freezing

Store: Keep cupcakes in an airtight container in the refrigerator for up to 3 days. Bring to room temperature before serving for best texture and flavor.

Freeze: To freeze, chill the frosted cupcakes on a baking sheet until the frosting firms (about 1 hour). Wrap each cupcake in plastic wrap and place in an airtight container. Freeze up to 3 months. Thaw at room temperature before serving.

Make-Ahead: You can bake the cupcakes in advance and store them unfrosted at room temperature for 1–2 days; refrigerate the frosting. Bring the frosting to room temperature and rewhip briefly before using.

Substitutions and Variations

• Chocolate version: Add 1/4 cup cocoa powder to the dry ingredients for chocolate eggnog cupcakes.
• Rum flavor: Substitute half the vanilla with rum extract for a more traditional eggnog profile.
• Mini cupcakes: Use a mini muffin tin and bake 10–12 minutes.
• No frosting: Dust with powdered sugar and nutmeg for a lighter treat.

My cupcakes came out dense — what happened?

Dense cupcakes are usually the result of overmixing. Stir just until ingredients are combined. Also check that your baking powder is fresh (replace every 6 months).

Can I make these without nutmeg?

Yes, but nutmeg gives the recipe its classic eggnog character. Cinnamon or a pumpkin pie spice blend are good alternatives.

My frosting is grainy — how do I fix it?

Grainy frosting usually means the butter wasn’t fully softened. Let the butter come to room temperature before mixing. If the frosting is already made, warm the bowl slightly and beat until smooth.

Recipe Tips

• Use room-temperature butter and eggs for better mixing and lighter cupcakes.
• Fill liners just over halfway so cupcakes rise without overflowing.
• Top with festive sprinkles or crushed candy canes for holiday flair.
• Be sure cupcakes are completely cool before frosting to prevent melting.
• Full-fat eggnog adds the best flavor and texture to both cake and frosting.

These eggnog cupcakes bring cozy Christmas flavors to a soft, sweet cupcake. They’re easy to make and ideal for sharing at holiday parties, family gatherings, or whenever you’re craving classic eggnog in dessert form.