Soft raspberry muffins made with plain kefir, light brown sugar and lemon zest, with fresh berries folded through the batter and a light sugar topping.
In a large bowl, whisk together 240 g all-purpose flour, 150 g light brown sugar, 1 tablespoon baking powder, and ½ teaspoon salt until evenly combined.
In a separate bowl, whisk together 240 g plain, unsweetened kefir, 60 ml sunflower oil, 1 medium egg, 2 teaspoons vanilla extract, and 1 tablespoon lemon zest until smooth.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Lightly toss 200 g fresh raspberries with an additional 1 tablespoon all-purpose flour, then carefully fold them into the batter without crushing them.
Divide the batter evenly among the 12 muffin cups, filling each about two-thirds full. Sprinkle 2 tablespoons granulated sugar evenly over the tops.
Bake for 18–20 minutes, until the tops are golden and a toothpick inserted into the center comes out clean. Cool for 1 hour in total before serving: leave the muffins in the tin for the first 5 minutes, then transfer them to a wire rack for the remaining cooling time.
Notes
Dry the raspberries: After rinsing, gently pat them dry before coating with flour. Excess water can make the batter wetter and cause the flour to clump. Zest lightly: Grate only the yellow part of the lemon peel. The white pith underneath can add bitterness. Leave small lumps: The batter does not need to be completely smooth. Stop stirring once no dry flour remains, then fold in the berries gently. Cool before covering: Let the muffins finish cooling on the rack before storing them. Covering them while warm traps steam and softens the sugar topping.