Summer Zucchini & Lemon Birthday Chelsea Buns with Chilled Elderflower Glaze

What Makes This Special

These birthday Chelsea buns celebrate British tradition with a bright summer twist—grated zucchini keeps the enriched dough moist and tender, while lemon zest and poppy seeds add zing. The buns are filled with sultanas and apricots for a fruity burst, then finished with a chilled, glossy elderflower glaze for a fresh, floral finish. Perfect for summer birthday parties and easy to transport, they look stunning when topped with edible flowers.

Ingredients

This recipe highlights seasonal zucchini for extra moisture, lemon for brightness, and elderflower for a quintessentially British summer touch.

For the Dough

• 450g strong white bread flour: Gives structure and chew.
• 60g caster sugar: Sweetens the dough.
• 9g fine sea salt: Balances flavours.
• 7g instant yeast: Leavens the dough.
• 150ml whole milk (cold): Hydrates and enriches.
• 60ml fresh lemon juice: Adds tang and lift.
• 2 large eggs (cold): Enriches and binds.
• 80g unsalted butter (cold, diced): For a soft, rich crumb.
• 150g zucchini, coarsely grated and squeezed dry: Adds moisture & subtle flavour.
• Zest of 2 lemons: For aromatic lift.
• 1 tbsp poppy seeds: Delicate crunch and brightness.
• 80g golden sultanas: Classic Chelsea bun fruit.
• 50g chopped dried apricot: Extra fruitiness.
• 1 tsp vanilla bean paste: Depth of flavour.

For the Filling

• 90g demerara sugar: Caramel notes.
• 60g unsalted butter, melted: Helps the filling stick.
• 1 tbsp lemon zest: Amplifies citrus.

For the Glaze

• 200g icing sugar: Base of the glaze.
• 3 tbsp elderflower cordial: Floral note.
• 25ml cold water: To achieve correct consistency.
• Edible flowers (optional): For show-stopping presentation.

Instructions

Step 1: Prepare the Zucchini

Coarsely grate the zucchini, then place in a clean kitchen towel and squeeze firmly to remove as much excess liquid as possible. This prevents a soggy dough and ensures even hydration.

Step 2: Make the Enriched Dough

In the bowl of a stand mixer, combine flour, caster sugar, salt, and yeast (keep yeast and salt on opposite sides). Add cold milk, lemon juice, eggs, and vanilla paste. Mix on low with a dough hook for 2 minutes. Add diced cold butter, a few pieces at a time, and mix until fully incorporated (about 5 minutes on medium). Add the grated zucchini, lemon zest, and poppy seeds. Mix again until dough is supple, smooth, and slightly tacky (another 5-8 minutes).

Step 3: Chill the Dough

Transfer dough to a lightly-oiled bowl, cover, and chill for 1 hour. Chilling makes it easier to handle, enhances flavour, and helps gluten develop—crucial for professional results.

Step 4: Shape and Fill

Turn the cooled dough onto a floured surface. Roll into a 40x30cm rectangle, about 1cm thick. Brush evenly with melted butter, sprinkle with demerara sugar, extra lemon zest, sultanas, and dried apricot.

Step 5: Roll Up and Slice

Starting from the long side, roll up tightly into a log. Trim ends, then cut into 12 even rolls using a sharp knife or dough scraper. Arrange, cut side up, into a parchment-lined 30x20cm tin, leaving slight gaps.

Step 6: Proof

Cover loosely with cling film or a damp towel. Let rise at room temperature (ideally 24°C) for 1.5–2 hours, or until doubled and just touching. For a clean bake, don’t overproof.

Step 7: Bake

Preheat oven to 180°C (160°C fan). Bake on the middle shelf for 28-32 minutes, rotating halfway, until golden brown and well-risen. Internal temperature should be 90°C.

Step 8: Cool and Glaze

Cool buns in the tin for 10 minutes, then transfer to a wire rack. Mix icing sugar, elderflower cordial, and cold water to a thick but pourable glaze. Chill glaze in the fridge for 10 minutes—this gives a crisp set and extra sheen. Drizzle over buns once they’re just warm, then top with edible flowers for birthday flair.

Pro Tips

• Use cold ingredients for maximum dough strength and to slow fermentation; this improves texture and flavour.
• Squeeze zucchini thoroughly or the dough will be too wet—aim for just-moist, not soggy.
• Chill the shaped rolls (covered) overnight for even better flavour and structure; bake fresh before serving for best results.

Troubleshooting

Dough too sticky to handle? Add a little extra flour (10-20g) during kneading, or chill longer before shaping.

Buns won’t rise? Ensure yeast is fresh and dough is proofed in a warm but not hot spot—cold dough will rise more slowly.

Variations

• Swap golden sultanas for dried cherries or blueberries for a different fruit profile.
• For extra crunch, sprinkle flaked almonds over the filling before rolling.
• Add 1 tsp ground cardamom to the dough for a subtle, spicy twist.

Storage

Best enjoyed the day they’re baked. Store in an airtight container at room temperature for up to 2 days, or freeze (un-glazed) for up to 1 month. Refresh in a warm oven and glaze just before serving. Glazed buns can be chilled for up to 24 hours—ideal for transporting to a barbecue or party.

Bright, summery, and utterly British, these sweet rolls will be the highlight of any birthday gathering!