Zesty Rhubarb Lemon Drizzle Cake

My neighbor Margaret once knocked on my door holding a bundle of rhubarb from her garden, and before I could say anything, she declared it was time I learned to bake something properly British with it.

I made this for a garden party last June and watched three guests go back for seconds before anyone touched the chocolate tart sitting right next to it.

Ingredients

• 200 g all-purpose flour: Plain flour gives this cake its tender crumb, so resist the urge to swap in self raising.
• 2 tsp baking powder: Fresh baking powder is essential here because this batter is heavy with fruit and needs every bit of lift.
• 1/4 tsp salt: Just enough to sharpen the lemon and keep the sweetness honest.
• 125 g unsalted butter, softened: Leave it out for an hour before baking so it creams smoothly without melting into a greasy puddle.
• 175 g granulated sugar: A moderate amount that lets the tart fruit and sharp drizzle do the talking.
• 2 large eggs: Room temperature eggs blend into the batter without causing it to curdle.
• Zest of 1 lemon: Rub the zest into the sugar with your fingers before mixing to release the oils.
• 1 tsp vanilla extract: A quiet backdrop that rounds out the citrus and fruit.
• 100 ml milk: Whole milk loosens the batter just enough so the rhubarb can distribute evenly.
• 250 g rhubarb, trimmed and diced: Cut the pieces roughly the size of a thumbnail so they stay intact without sinking.
• Juice of 1 large lemon: Fresh squeezed only, because the bottled stuff tastes flat and metallic against the sugar drizzle.
• 75 g granulated sugar for drizzle: This dissolves into the lemon juice and creates that irresistible crystalline top.
• Extra lemon zest and icing sugar for decoration: Entirely optional but a pale gold dusting makes it look like something from a bakery window.

Instructions

Preheat and prepare your tin:

Set your oven to 180 degrees C (350 degrees F) and grease a 20 cm round tin before lining the base with baking paper so nothing sticks.

Sift the dry ingredients:

Sift the flour, baking powder, and salt into a bowl and set it aside while you work on the butter mixture.

Cream butter and sugar:

Beat the softened butter and sugar together until the mixture turns noticeably paler and feels light and fluffy under the whisk.

Add eggs and flavour:

Drop in one egg at a time, beating well after each, then stir through the lemon zest and vanilla until everything smells wonderful.

Bring the batter together:

Fold in half the flour mixture followed by half the milk, then repeat with the rest, stopping as soon as no dry streaks remain.

Fold in the rhubarb:

Tip in the diced rhubarb and fold gently with a spatula so the pieces stay whole and the batter does not deflate.

Bake until golden:

Spoon the batter into your prepared tin, smooth the top, and bake for 45 to 55 minutes until a skewer inserted in the centre comes out clean.

Mix the lemon drizzle:

While the cake bakes, stir the lemon juice and sugar together in a small bowl until the grains disappear completely.

Soak the hot cake:

Pull the cake from the oven and immediately poke it all over with a skewer, then pour the drizzle slowly so it sinks into every hole.

Cool and finish:

Let the cake rest in its tin for 15 minutes, then turn it out onto a wire rack to cool fully before dusting with icing sugar and extra zest if you like.

Save

The moment I carried this cake to the table still warm from the tin, the lemon steam rising, I realized Margaret had given me something better than rhubarb.

Swapping the Fruit Through the Seasons

When rhubarb disappears from the shops, raspberries or diced strawberries slide right into this recipe with almost no adjustment.

Serving It Like It Deserves

A dollop of creme fraiche cuts the sweetness beautifully, and a glass of chilled Riesling turns a simple afternoon slice into something approaching a proper occasion.

Getting Ahead and Storing

This cake actually improves overnight as the drizzle settles into the crumb, so baking it a day ahead is not just acceptable but advisable.

• Wrap it tightly in foil once fully cool and it stays moist for up to three days.
• You can freeze individual slices between sheets of baking paper for up to a month.
• Always bring it back to room temperature before serving so the texture softens again.

Save

Every spring I make this cake at least twice, once for myself and once for whoever happens to be at the kitchen table when the rhubarb appears.

Recipe FAQs

→ Can I use frozen rhubarb instead of fresh?

Yes, frozen rhubarb works well in this cake. Thaw and drain excess liquid before folding into the batter to prevent the cake from becoming too soggy. You may need to add 1-2 minutes to the baking time.

→ How should I store the cake?

Keep in an airtight container at room temperature for up to 3 days. The lemon drizzle helps keep the cake moist. For longer storage, wrap well and freeze for up to 3 months.

→ Can I make this cake gluten-free?

Substitute the all-purpose flour with a good quality gluten-free flour blend containing xanthan gum. The texture may be slightly denser but still delicious.

→ Why is my cake sinking in the middle?

This can happen if the oven temperature is too low or the cake is underbaked. Use an oven thermometer to verify temperature and ensure the skewer comes out completely clean before removing from the oven.

→ Can I reduce the sugar content?

You can reduce the sugar in the cake by 25g, but keep the drizzle sugar as-is since it creates the signature topping and helps preserve the cake's moisture.