Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe

If you’re anything like me, you love Halloween treats that are both adorable and downright tasty. I’m super excited to share this Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe with you because it’s one of those festive desserts that really steals the show at any spooky gathering. These little mason jar cakes are easy to layer, look so fun with those purple and green swirls, and the spider web chocolate decoration just pulls everything together perfectly. Stick with me—I’ll walk you through everything so you can nail the look and flavor!

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Ingredients & Why They Work

This recipe keeps things straightforward with simple ingredients that combine for a delicious devil’s food cake base paired with fluffy, creamy frosting. The purple and green add a festive punch, and the chocolate melts are perfect for decorating without fuss.

• Devils Food Chocolate Cake Mix: The rich chocolate flavor is the perfect spooky base, plus it’s easy and consistent.
• Vegetable Oil, Eggs, Water: Following the box instructions ensures your cake layers come out moist and tender every time.
• Butter: Room temperature butter makes for the smoothest, creamiest frosting texture.
• Powdered Sugar: Gives frosting that perfect sweet and silky consistency.
• Marshmallow Cream: Adds extra fluffy sweetness and a dreamy texture to the frosting.
• Vanilla Extract: Boosts flavor depth and balances the sweetness.
• Purple and Green Food Coloring: Creates those fun Halloween colors for your frosting layers.
• Dark Chocolate Candy Melts: Easy to melt and pipe for your spider web decorations.
• Mason Jars (8 oz): Serve as charming little cake holders that are eco-friendly and reusable.
• Ziploc or Piping Bags: For neat and easy frosting application.
• Sprinkles (Optional): Adds an extra pop of festive fun and texture on top.

Make It Your Way

One of my favorite things about this Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe is how customizable it is. You can easily swap out the cake mix for your favorite flavor, change the frosting colors, or even jazz up decorations to suit your theme—or the season.

• Variation: I once swapped out the devil’s food mix for a red velvet one and tinted the frosting pink and black—it was a hit for Valentine’s Day with a spooky twist!
• Dietary Switch: Try using a gluten-free cake mix and dairy-free butter for guests with allergies—I’ve done that and no one missed a beat.
• Seasonal Flare: Instead of spider webs, try piping snowflakes with white chocolate melts during winter holidays for a whole new vibe.

Step-by-Step: How I Make Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe

Step 1: Prep and Bake Your Chocolate Cupcakes

First things first—heat your oven to 350°F. I use regular-size muffin pans lined with paper baking cups, which keeps my cupcakes from sticking and makes them easier to halve later on. Mix up your devil’s food cake batter exactly as the box directs, using the recommended amount of oil, eggs, and water. Pour the batter into the cups until they’re about two-thirds full to give them room to rise without overflowing. Bake for about 18 minutes or until a toothpick comes out clean. Once out, set them on a cooling rack—don’t rush this; cool cupcakes frost better and slice easier without crumbling.

Step 2: Whip Up That Marshmallow Buttercream

While your cupcakes cool, it’s frosting time. Using a stand mixer or hand mixer, cream one cup of room temperature butter until smooth and silky. Add the 7 oz jar of marshmallow cream next, mixing until fluffy. Now, slowly blend in two cups of powdered sugar and a teaspoon of vanilla extract. Beat it all for about 4 minutes so your frosting is perfectly blended and heavenly light—not dense or gritty.

Step 3: Color Your Frosting

Divide your frosting evenly into two bowls. To one, add 3 drops of purple food coloring; to the other, 3 drops of green. Mix each well, adding a drop or two more if you want deeper color. Remember, a little goes a long way!

Step 4: Build Your Layers in Mason Jars

Carefully remove the paper liners from your cooled cupcakes. Slice each cupcake horizontally so you get two thin layers. Place the first half at the bottom of each 8 oz mason jar. Spoon your purple frosting into a Ziploc or piping bag, snip a small corner, and pipe a generous swirl over the cake layer. If you want, sprinkle a few candies or sprinkles on top for some extra texture and color. Repeat with the green frosting and the other cupcake half, finishing with a final layer of frosting and sprinkles on top. The layering is not just tasty but really cute to look at through the jar.

Step 5: Create Your Spider Web Decorations

Here’s the fun artistic part! Draw or print a spider web design on a sheet of paper, then lay wax paper on top. Melt your dark chocolate candy melts in short 30-second bursts in the microwave—be patient here, stirring in between to avoid burning. Pour the melted chocolate into a piping bag or a small Ziploc with a tiny tip cut. Carefully trace the web design on the wax paper and let them cool and harden completely. Once set, slide your chocolate spider webs gently into the top of each jar or lean them against the inside rim for a spooky effect.

How to Serve Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe

Garnishes

I love toppling these jars with a few whimsical garnishes like mini candy spiders, edible glitter, or even some orange and black Halloween sprinkles. It just makes them feel extra festive. Once, I added a tiny plastic spider on the jar lid for a playful surprise—it went down a treat with the kids!

Side Dishes

Since these cakes are rich and chocolatey, I like serving them with light sides like fresh fruit skewers or a tangy citrus punch to balance out the sweetness. If you’re at a party, some salty popcorn or roasted pumpkin seeds make a fun combo.

Creative Ways to Present

For Halloween parties, I’ve arranged these mason jar spider web cakes inside a decorated wooden crate filled with faux spider webs and tiny LED lights. It really amplifies the spooky atmosphere. Another fun idea is tying a black ribbon or twine around the jars with a cute tag—personalized treats that double as favors!

Make Ahead and Storage

Storing Leftovers

I keep these mason jar cakes refrigerated, covered tightly with a lid or plastic wrap. They stay moist and fresh for up to 3 days. Leaving the spider web decorations off until serving helps them avoid getting soggy or sticky.

Freezing

If you want to prep ahead, I recommend freezing the unfrosted cake layers separately, wrapped well to avoid freezer burn. The frosting can be frozen in airtight containers too. Once thawed, assemble your jars and add the decorations. This helped me when prepping for a big Halloween party last year—total lifesaver.

Reheating

For the best texture, I generally don’t reheat these cakes. But if you want to, just let the jar come to room temp for about 30 minutes before eating, which brings the frosting and cake back to softness without losing that fresh-from-the-oven vibe.

FAQs

Final Thoughts

This Mason Jar Spider Web Cakes with Purple and Green Frosting Recipe really has a special place in my seasonal baking lineup. It’s fun to make, easier than it looks, and always gets big smiles. Plus, serving cake in mason jars just makes everything feel cozier and more personal. If you’re looking for a recipe that combines playful presentation with delicious taste, this one is it. I can’t wait for you to try it out and add your own twists!

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