Lemon-Blueberry Muffins with Brown Sugar Oat Crumble

Make it

Instructions

1. 01

   Heat the oven and line the pan

   Set an oven rack in the center and heat the oven to 375°F (190°C). Line all 12 cups of a standard muffin pan with paper liners; set the lined pan aside. Set out two mixing bowls, a small bowl, a whisk, and a spoon. | Why: Lining the pan before mixing means the batter can go straight into the oven.

2. 02

   Make the oat crumble

   In the small bowl, combine 40 g rolled oats, 40 g all-purpose flour, and 40 g light brown sugar. Cut 30 g cold unsalted butter into small cubes and rub it into the mixture with your fingertips until moist clumps form. Set aside at room temperature while you make the batter. | Why: Small buttery clumps bake into a crisp, craggy topping.

3. 03

   Whisk the dry ingredients

   In the large bowl, whisk 240 g all-purpose flour, 110 g granulated sugar, 2 tsp baking powder, and 1/2 tsp fine salt until evenly distributed. Make a shallow well in the center. | Why: Distributing the leavener evenly helps every muffin rise.

4. 04

   Mix the lemon and wet ingredients

   Wash and dry 1 lemon. Finely zest it, then cut and squeeze it; measure 1 tbsp lemon juice from the squeezed fruit (save any remainder for another use). In the second mixing bowl, whisk 2 eggs, 180 ml whole milk, and 80 ml neutral oil with the zest and measured juice until smooth. | Why: Whisking the liquids separately prevents overmixing the flour later.

5. 05

   Fold in the berries and fill the lined pan

   Rinse 180 g fresh blueberries under cool running water, drain well, and pat completely dry. Pour the wet mixture into the dry mixture and fold gently with a spoon just until no dry flour remains; a few lumps are fine. Fold in the dried berries. Divide the batter evenly among the 12 paper-lined cups, filling each about three-quarters full, then divide the prepared oat crumble evenly over the tops. | Why: Dry berries and minimal stirring keep the muffins tender instead of soggy or tough.

6. 06

   Bake until golden

   Place the filled pan on the center rack of the 375°F (190°C) oven. Bake for 20–22 minutes, until the tops are golden, spring back lightly when pressed, and a toothpick inserted into the cake portion of a center muffin comes out without wet batter (a berry stain is fine). If needed, bake 1–2 minutes more and check again. | Why: Testing the cake rather than a juicy berry gives a reliable doneness check.

7. 07

   Cool and serve

   Set the pan on a wire rack and let the muffins cool in the pan for 5 minutes. Lift them out by their liners and cool on the rack for at least 5 more minutes before serving warm or at room temperature; the tops should feel set, not wet. | Why: Brief cooling sets the crumb and keeps the bottoms from steaming in the pan.