Cake in a Jar | Handmade Buttercream Desserts

All natural. No additives no preservatives.

£9.95

Pickup available at Shop location

Usually ready in 24 hours

Freshly made to order and shipped within 1 business day – Next Day UK Delivery via Royal Mail Tracked 24.

Cake in a Jar: The Ultimate Any-Day Indulgence

Why wait for a birthday or a wedding to enjoy a slice of perfection? At Frostella, we believe every day deserves a celebration. Our signature cakes are now available in elegant 500g glass jars with a metal twist lid, layering our fluffy sponge, silky buttercream, and handmade fillings into a portable, premium dessert.

Whether you're treating yourself after a long day or sending a sweet surprise to a friend, our jars deliver the "bakery-fresh" experience straight to your spoon.

Pure, Honest Ingredients

We don’t do "artificial." Everything inside this jar is crafted from scratch:

The Sponge: Light, airy, and made with traditional flour, sugar, and farm eggs.
The Buttercream: A velvety mix of pure butter, egg whites, sugar, and natural vanilla extract.
The Artisanal Touches: No pre-made fillings here. We slow-cook our own preserves and curds to ensure every bite is bursting with real flavour.

Choose Your 500g Jar

Strawberry Orchard: A nostalgic delight featuring our handmade berry preserve. Fresh strawberries simmered with a hint of lemon juice, swirled through layers of cake and buttercream.
Lemon Drizzle Dream: Zesty and bright. We fold our homemade lemon curd—crafted from fresh lemons—directly into the buttercream for a sharp, refreshing citrus kick.
Golden Caramel Bliss: The ultimate comfort. Our slow-cooked buttery caramel is prepared by hand to a deep golden perfection, creating a rich, melt-in-the-mouth experience.

Sustainability & Care

Eco-Friendly Packaging: Our 500g glass jars are fully reusable and recyclable. Once you’ve finished your cake, they are perfect for storing spices, jams, or trinkets.
Handmade in Small Batches: Ensuring that "just-baked" quality in every single jar.
No Artificial Colours: Just the honest, vibrant colours of nature.

🥄 For the Ultimate Experience
Our cakes are best enjoyed at room temperature. After taking your jar out of the fridge, let it sit for 15–20 minutes before diving in. This allows the organic butter in our buttercream to soften to its signature velvety texture.

❄️ Keeping it Fresh
If you aren't indulging immediately, please keep your jar refrigerated. Our all-natural ingredients stay delicious for up to 7 days when stored in the fridge with the metal lid tightly fastened.

🧊 Freezing for Later
Frostella jars are perfectly suitable for freezing for up to 3 months. Simply ensure the lid is secure before placing it in the freezer.

✨ Thawing Instructions
When the craving hits, thaw your jar in the fridge overnight. For the best consistency, let it reach room temperature naturally before serving.

♻️ Give Your Jar a Second Life
Once you’ve finished your dessert, our 500g glass jars are yours to keep. Wash them out and reuse them for spices, overnight oats, or home organisation.

The Base Components:

The Sponge: Premium wheat flour, British farm-fresh eggs, natural cane sugar, and a touch of baking staple.
The Signature Buttercream: Pure creamery butter, granulated sugar, fresh egg whites, and premium vanilla extract.

The Flavours:

Strawberry Orchard: Fresh whole strawberries, natural cane sugar, and a squeeze of fresh lemon juice.
Lemon Drizzle Dream: Freshly squeezed lemon juice, zest, British farm eggs, sugar, and pure butter (our handmade lemon curd).
Golden Caramel Bliss: Double cream, pure butter, and caramelised cane sugar, slow-cooked to perfection.