The Best Harry Potter Butterbeer Drip Cake

This Harry Potter ButterBeer Drip Cake is so great for Harry Potter themed parties! If you love butterbeer this cake is for you!

My youngest is a Harry Potter kid the way I was a Harry Potter kid — obsessively. When birthday cake requests started, there was exactly one answer: butterbeer. Not just the flavor. The whole thing. The drip, the rosettes, the golden color, the butterscotch. It had to look like something from Hogsmeade.

This is that cake. It’s a doctored yellow cake mix with butterscotch pudding and cream soda baked in — which sounds like a shortcut but is actually a technique. The pudding mix keeps the crumb tight and moist, the cream soda adds a subtle fizz and sweetness that you can’t get from water alone, and the result is a cake that tastes homemade in the best way. The frosting is butterbeer-flavored — cream soda worked into a butter and shortening base — and the drip is straight butterscotch ganache.

It takes some time and the right tools, but it’s more approachable than it looks. I’ll walk you through every step.

What ingredients do you need for this Harry Potter ButterBeer cake?

Butterbeer cake:

2 (15.25oz) Yellow Cake Mix

1 (3.9oz) Jello brand instant butterscotch pudding mix

6 large eggs

2 cups water

2/3 cup vegetable oil

½ cup cream soda

2 tsp vanilla extract

Butterbeer Frosting

1 cup unsalted butter, room temperature 

1 cup vegetable shortening (Crisco)

5 cups powdered sugar

1/2 cup cream soda 

Butterscotch Ganache for Drip

¾ cup butterscotch chips

¼ cup heavy cream

INGREDIENT NOTES

Cake

2 boxes yellow cake mix (15.25 oz each) — Two boxes gives you enough batter for four 8-inch rounds, which makes a tall 4-layer cake, or you can bake two thicker layers. Most home bakers do two pans and get two layers. If you want four thinner layers with more frosting between them, use all four.

Jello brand instant butterscotch pudding mix (3.9 oz) — This is the secret to the crumb texture. Instant pudding mix added dry to cake batter is a classic box mix doctoring technique — it adds moisture, density, and a tighter crumb that holds up better to frosting and stacking. Use instant, not cook-and-serve.

Cream soda (½ cup in cake, ½ cup in frosting) — The cream soda does two things: it adds a subtle butterscotch-vanilla flavor and provides a slight fizz that lightens the batter. Use regular cream soda, not diet — the sugar content matters for the cake structure. IBC and A&W are both good options.

Frosting

Vegetable shortening (1 cup, Crisco) — Shortening in frosting isn’t just filler — it stabilizes the buttercream at room temperature and gives it a brighter white color than an all-butter frosting. It also makes the frosting easier to work with for the comb texture technique. Don’t substitute all butter or the frosting will be too soft to hold the pattern.

5 cups powdered sugar — Sift it before adding if your powdered sugar has been sitting for a while. Lumps in the sugar create lumps in the frosting that show up when you run the cake comb.

Ganache

Butterscotch chips (¾ cup) — Standard Nestle or Hershey’s butterscotch chips work fine. Make sure they’re fresh — old chips can seize during melting and won’t smooth out properly.

Heavy cream (¼ cup) — The ratio of chips to cream here is intentional. More cream makes a thinner ganache that drips too fast; less makes it too thick to drip at all. Stick to the ratio.

How Do You Make this Butterbeer Cake?

Bake the cake layers. Grease and flour two 8×2-inch round cake pans (or spray with baking spray that contains flour). Preheat the oven to 350°F. In a large bowl or stand mixer, combine both boxes of cake mix, the pudding mix, eggs, water, and oil. Mix on medium until incorporated — about 2 minutes. Add the vanilla extract and cream soda and mix until just combined. Don’t overmix after the cream soda goes in. Divide the batter evenly between the prepared pans and bake for 35–40 minutes, until a skewer or toothpick inserted in the center comes out clean.

Cool and level. Let the cakes cool in their pans for 15 minutes, then turn out onto a wire rack and cool completely — at least 1 to 1.5 hours. Once fully cooled, use a serrated knife or cake leveler to trim any dome off the top of each layer, creating a flat, even surface. This is the leveling step — it’s done after removing from the pan, not inside it. Wrap and freeze if making ahead (see above).

Make the ganache. Pour the heavy cream into a microwave-safe bowl and heat for 40 seconds. Pour directly over the butterscotch chips and let it rest undisturbed for 7–9 minutes — this gives the hot cream time to melt the chips from the outside in. Then stir slowly from the center outward until smooth ganache forms. If any chips remain unmelted, microwave in 10-second bursts, stirring between each, until fully smooth. Transfer to a piping bag or squeeze bottle and let it cool to room temperature before using for the drip — it should be the consistency of slightly warm honey. Too warm and it runs; too cool and it won’t flow.

Make the frosting. Beat the room-temperature butter and shortening together on medium until completely smooth, about 2 minutes — no lumps. Add half the powdered sugar and ¼ cup of cream soda and mix on low until incorporated. Add the remaining powdered sugar and remaining ¼ cup cream soda. Mix on low until combined, then increase to high and beat for 4–5 minutes until the frosting is light, fluffy, and bright white.

Assemble. Place a small dollop of buttercream on your cake board to anchor the first layer. Set the first cake layer cut side up. Add a generous layer of buttercream and spread it evenly to the edges with an offset spatula. Drizzle a small amount of the cooled butterscotch ganache over the buttercream filling — just a drizzle, not a full pour. Place the second layer cut side down on top.

Frost and texture. Apply a thin crumb coat of buttercream all over the cake — sides and top — and refrigerate for 15–20 minutes to set. Then apply your final, thicker coat of buttercream. Use a cake comb or bench scraper held against the side of the cake at a slight angle while slowly rotating the turntable to create the textured pattern and remove excess. Run the comb over the top edge as well. No cake should be visible through the frosting at this point.

Apply the drip. Make sure your ganache is at the right temperature — warm but not hot. Starting at the edge of the top of the cake, use a piping bag or squeeze bottle to add small amounts of ganache around the rim, letting it drip down the sides. Work slowly and in small amounts. You can always add more; you can’t remove a drip that’s gone too far. Fill the top of the cake with a smooth layer of ganache if desired.

Finish with rosettes. Fit a piping bag with a 1M tip and fill with the remaining buttercream. Pipe rosettes around the top edge of the cake. Immediately add sprinkles before the buttercream sets.

TIPS

Temperature controls everything on a drip cake. The ganache should be around 90–95°F for a controlled drip — warm but not runny. If you don’t have a thermometer, test on the side of the bowl: it should flow slowly when tilted, not pour freely. If it’s too thick, microwave in 5-second bursts. If it’s too thin, let it sit at room temperature for a few more minutes.

Crumb coat is not optional. Skipping the crumb coat means your final frosting will be full of crumbs. It adds 20 minutes (15 in the fridge) and saves the whole finish.

Room temperature butter only. Cold butter in buttercream makes a lumpy, grainy frosting. If you forgot to pull the butter early, cut it into small cubes and microwave in 5-second bursts until it gives slightly when pressed but isn’t shiny or melted.

The cake comb direction matters. Hold the comb steady and rotate the turntable rather than moving the comb. Moving the comb creates uneven lines. If you don’t have a turntable, hold the comb still and slowly rotate the cake board.

Make this cake over two days. Day 1: bake, cool, level, freeze the layers. Day 2: make frosting and ganache, assemble, decorate. Spreading it across two days makes a project that feels manageable rather than overwhelming.

VARIATIONS

4-layer version. Use four 8-inch pans and divide the batter among all four. Thinner layers mean more frosting between them — which most people consider a feature, not a bug.

Chocolate Harry Potter version. Swap the yellow cake mix for chocolate and use chocolate ganache instead of butterscotch. Cross-link to the Chocolate Harry Potter Birthday Cake post for that full recipe.

Hogwarts house colors. Tint the buttercream to match a specific Hogwarts house — gold and scarlet for Gryffindor, green and silver for Slytherin, blue and bronze for Ravenclaw, yellow and black for Hufflepuff. Split the frosting and tint portions with gel food coloring, then apply in alternating horizontal bands before combing.

Mini individual cakes. Use 4-inch round pans and divide the batter into individual mini layer cakes. Perfect for a Harry Potter party where each guest gets their own cake.

WHAT IS A DRIP CAKE?

A drip cake is decorated with a controlled pour of ganache or sauce along the top edge of the cake, allowed to run partway down the sides in intentional drips. The effect looks complex but is mostly about temperature — the ganache needs to be warm enough to flow but cool enough not to run all the way to the bottom. On this cake, the drip is butterscotch ganache, which sets to a slightly firm finish and holds its shape beautifully against the pale gold frosting.

The key phrase in any drip cake tutorial is “a little goes a long way.” You always want less than you think. You can add more drips; you can’t undo a ganache that’s run to the cake board.

EQUIPMENT YOU’LL NEED

Before you start, make sure you have: two 8×2-inch round cake pans, a stand mixer or hand mixer, a cake board (10-inch works well for an 8-inch cake), an offset spatula, a cake comb or bench scraper for texturing the sides, a turntable (strongly recommended — not required but makes everything easier), a piping bag, and a 1M piping tip for the rosettes. You’ll also need a microwave-safe bowl for the ganache and a small piping bag or squeeze bottle for the drip application.

FAQS

This is one of those cakes that earns a reaction the second you set it on the table. The golden drip, the rosettes, the butterscotch smell coming off the whole thing — it’s a showstopper, and it’s genuinely delicious on top of looking the part.

If your house has a Harry Potter fan, this is the birthday cake. No contest.

Tag me on Instagram (@glamnellie) when you make it — I love seeing how these cakes come out in everyone’s kitchens. And if you’re building out a full Harry Potter party spread, check out the Sorting Hat Cupcakes, the Butterbeer Cupcakes, and the Butterbeer Cookies — all linked below.

Here are some more fun Harry Potter themed treats to try: