The Duchess's Garden Party Trifle Jar
Raspberry, rose & prosecco — made the night before, travels beautifully, arrives looking effortless.
AD — This recipe was developed in partnership with Battle Proms. All opinions, enthusiasm, and rose water opinions are entirely my own.
There is a category of dish that I think about more than I probably should. The arrives looking like you didn't try category. The thing that comes out of the cool bag at the picnic and makes people put down whatever they were holding and say oh. The thing that photographs itself.
This trifle jar is that thing.
I developed it specifically for the Battle Proms — because if you're going to sit on the grounds of Highclere Castle as the sun goes down and an orchestra plays and a Spitfire passes overhead, you need a pudding that is equal to the occasion. And a supermarket tiramisu in a plastic pot, however excellent, is not quite equal to Highclere Castle.
Individual Kilner jars mean no serving, no slicing, no hoping the layers hold when you spoon it out onto a paper plate in a field. Each person gets their own perfectly layered, completely transportable, deeply elegant little pot of raspberry, rose, and prosecco trifle. Made the night before. Travels beautifully. Arrives looking like you assembled it on the picnic rug, which — as far as anyone needs to know — you absolutely did.
This is also, I should say, the recipe that made me understand what rose water is actually for. Used well, it doesn't taste floral or perfumed or like you've made a mistake. It whispers. It makes the raspberries taste more like themselves, and the cream taste like something from a garden party in a novel you want to live in. Used badly — too much, cheap brand — it tastes like a soap dish. So we'll talk about that.
Right. Let's make something wonderful.
The Duchess's Garden Party Trifle Jar
Raspberry, rose & prosecco — individual Kilner jars, made the night before.
SERVES - 6 jars | TIME - 30 mins + overnight | DIFFICULTY - Easy
What You'll Need
FOR THE RASPBERRY BASE
· 400g fresh raspberries — plus 18 perfect ones reserved for the top
· 3 tbsp caster sugar
· 1 tsp rose water — Nielsen-Massey if possible — more on this below
FOR THE SPONGE
· 300g Madeira cake — shop-bought is absolutely fine
· 100ml prosecco — or elderflower cordial for non-alcoholic
FOR THE CREAM LAYER
· 300g full-fat cream cheese — Philadelphia
· 200ml double cream
· 4 tbsp icing sugar — sifted
· 1 tsp vanilla bean paste
TO FINISH
· 2 tbsp dried edible rose petals
· 1 tbsp gold sugar pearls
· 18 perfect fresh raspberries — reserved from above
How to Make It
STEP 1 - Macerate the raspberries
Put your 400g raspberries (keeping those 18 perfect ones aside — hide them if necessary) into a bowl with the caster sugar and rose water. Stir gently — you're not mashing, you're persuading — and leave for at least 30 minutes, or overnight in the fridge if you're being organised.
The sugar draws out the juices and creates a ruby syrup that is frankly too good to exist. Taste it. Then taste the rose water level: it should feel romantic, not floral. If it's shouting, add a little more fruit. If it's whispering, it's perfect. Leave it alone.
STEP 2 - Soak the sponge
Slice your Madeira cake into rough 2cm cubes. They don't need to be neat — nobody will ever see them and the trifle doesn't care. Divide between your 6 Kilner jars and spoon the prosecco evenly over each — about 1½ tablespoons per jar.
Wait five minutes. The sponge should be moist but not waterlogged, like it's been given just enough. It should smell quietly celebratory. This is the correct amount of prosecco to put in a trifle jar however feel free to adjust according to your feelings.
STEP 3 - Make the cream layer — your secret weapon
Beat the cream cheese until smooth — really smooth, no lumps. Add the sifted icing sugar and vanilla bean paste and beat again until it's silky and slightly glossy and you've already eaten a spoonful directly from the bowl.
In a separate bowl, whip the double cream to soft peaks — it should hold its shape without being stiff or grainy. Think: just confident enough.
Fold the whipped cream into the cream cheese in two additions, gently. This is the layer that makes people ask for the recipe. It looks like whipped cream, tastes like a cloud, holds its shape for hours outdoors without weeping, and requires no gelatine, no faff, and no anxiety. Remember it. Use it forever.
STEP 4 - Layer the jars — this is the satisfying part
Spoon the macerated raspberries — with all their gorgeous syrup — over the soaked sponge in each jar. Be generous. Don't be shy about the syrup.
Now: press 3–4 of your reserved raspberries against the inside of the glass, around the edge, before you add the cream layer. This is the move. The berries become visible through the glass and the whole thing looks like a patisserie window. It takes approximately fifteen seconds and requires no skill whatsoever. Do it every time.
Spoon the cream layer generously on top and smooth it level with the back of a spoon.
STEP 5 - Finish, seal, and sleep on it
Top each jar with 3 perfect raspberries, a pinch of dried rose petals, and a scatter of gold sugar pearls. Seal with the Kilner lids.
Refrigerate for a minimum of 4 hours — overnight is genuinely better. This is the trifle's finest quality: it improves while you sleep. The layers settle into each other, the sponge softens further, and everything becomes something more than the sum of its parts.
STEP 6 - Pack and transport
Pack the sealed jars upright in a cool bag with a good ice block beneath them. They'll hold happily for 4–6 hours. Do not lay them on their side. That way lies a ruby catastrophe.
Bring a small pot of extra rose petals and gold pearls in your bag. A 30-second refresh on arrival — a few petals replaced, a scatter of pearls — and they'll look like you assembled them on the picnic rug. Which, as we've established, is the story we're telling.
Gemma's Notes
The jar — 300–350ml wide-mouth Kilner jars are ideal. The wide mouth means the layers are visible from the side, easy to eat from without cutlery gymnastics, and frankly beautiful. The jar is part of the presentation.
Non-alcoholic swap — Replace the prosecco with St. Elder Elderflower Cordial diluted 50/50 with sparkling water. Equally elegant, equally celebratory, and honestly just as good.
Rose water, seriously — Brands vary wildly in strength and this matters more than almost anything else in this recipe. Nielsen-Massey is the gold standard — consistent, clean, genuinely floral. Supermarket brands can be twice as strong or half as strong. Start with ½ tsp if you're unsure and taste before committing. Rose water should feel romantic. If it tastes like a soap dish, you've gone too far.
Make-ahead window — These are genuinely better made the night before. 24 hours is the sweet spot. Any more and the sponge gets a little too soft. Any less and the layers haven't fully introduced themselves to each other.
Scaling up — This recipe doubles beautifully for larger gatherings. For a very grand occasion — hello, Highclere Castle — twelve jars made the night before and transported in two cool bags is entirely manageable and will make you look like a professional caterer. You are welcome.
This trifle jar was developed as part of my Battle Proms partnership — and it's designed to be the pudding at the end of the most magnificent British summer picnic you'll ever pack.
If you're planning your Battle Proms hamper — or honestly any grand outdoor occasion this summer — this pie belong alongside it:
→ The Duchess's Picnic Pie — the savoury hero of the same hamper, built to travel and built to impress
And if you make the trifle jars — please, please show me. Find me on Instagram and let me see your layers. Especially if you make them at the actual Battle Proms. I'll be the one on the blanket at Highclere, trying to look calm.
With love,
Gemma xx
The Duchess of Picnics | gemmaduck.com
AD — Developed in partnership with Battle Proms. Alongside → Five Truly British Ways to Picnic This Summer — including everything you need to know about Battle Proms and why I'm going to Highclere Castle with considerable excitement and → The Duchess's Picnic Pie — the savoury hero of the same hamper, built to travel and built to impress