What Creates the Lemon-Blueberry Crumb

Plain flour gives the muffins structure, while melted butter and eggs keep the crumb tender. Fresh lemon zest and juice sharpen the flavour of the blueberries, and coarse sugar provides the crisp topping.

• Plain flour (or 2 cups) – Spoon and level into measuring cups so that the batter does not become too dense.

• Baking powder – Provides the main lift for the muffins. Make sure it is within date and stored properly.

• Salt – Helps balance the sweetness and lemon flavour.

• Granulated sugar (or ¾ cup) – Used in the batter (rubbed with lemon zest to release its oils).

• Large eggs – Room-temperature eggs combine more easily with the slightly cooled melted butter and other wet ingredients.

• Unsalted butter, melted and cooled (or ½ cup) – Melt and cool slightly before whisking into the wet ingredients.

• Whole milk (or ½ cup) – Room-temperature milk combines more easily with the melted butter and eggs.

• Fresh lemon juice – Fresh lemon juice adds acidity and fresh citrus flavour to the batter.

• Fresh lemon zest – Rub into the sugar with your fingertips to release aromatic citrus oils.

• Vanilla extract – Adds a subtle background flavour that complements the lemon and blueberries.

• Fresh blueberries (or ~225g) – Tossing the blueberries lightly in flour helps reduce surface moisture and makes them easier to fold evenly through the batter.

• Coarse sugar – Sprinkled over the tops right before baking for a crisp, crackly crust.

How to Make Lemon Blueberry Muffins

Step 1: Preheat Oven & Line Tin

Preheat the oven to 218°C (425°F) and line a 12-hole muffin tin with paper cases. The higher initial temperature gives the muffins a stronger early rise.

Step 2: Whisk Dry Ingredients

In a large mixing bowl, whisk together the plain flour, baking powder and salt until thoroughly combined.

Step 3: Rub Lemon Zest into Sugar

Add the lemon zest to the granulated sugar and rub them together with your fingertips for 1–2 minutes, until the sugar is pale yellow and fragrant.

Step 4: Whisk Wet Ingredients

Add the room-temperature eggs, slightly cooled melted butter, milk, fresh lemon juice and vanilla extract to the lemon sugar. Whisk until evenly blended and emulsified.

Step 5: Fold Wet into Dry

Fold the wet mixture into the dry ingredients until only a few small streaks of flour remain. The final folds used to add the blueberries will finish combining the batter.

Step 6: Fold in Blueberries

Toss the blueberries with 1 tablespoon of flour, then fold them through the batter with 3–4 gentle strokes.

Step 7: Fill Cases & Sugar Tops

Divide the batter evenly among the 12 cases and sprinkle the coarse sugar over the tops.

Step 8: Two-Stage Bake

Bake for 5 minutes at 218°C (425°F), then reduce the oven to 175°C (350°F), without opening the door, and bake for a further 15–17 minutes. The muffins should be golden and a skewer inserted into the centre should come out clean or with a few moist crumbs.

Step 9: Cool on Wire Rack

Leave the muffins in the tin for 5 minutes, then transfer them to a wire rack to cool.

Start Hot, Then Keep the Mixing Gentle

Storage & Freezing

Blueberry and Citrus Variations

Serving the Muffins

Serve the muffins once they have cooled enough for the crumb to set, either at room temperature or slightly warm. They are good on their own, but a little butter or a small spoonful of lemon curd can be added if you want something alongside. Keep the serving simple so the lemon, blueberries and crisp sugar top remain the main flavours.