Begin by preheating your oven to 375°F (190°C). Line a muffin tin with paper liners or grease it with a little oil or butter to prevent sticking.
In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, baking soda, and salt until they are thoroughly combined and no clumps remain.
In a separate bowl, crack the large egg and beat it lightly. Then, add the vegetable oil, buttermilk, lemon zest, fresh lemon juice, and vanilla extract. Whisk these wet ingredients together until the mixture is smooth and well-blended.
Pour the wet mixture into the bowl containing the dry ingredients. Using a spatula, gently fold the ingredients together until just combined. Take care not to overmix; it’s perfectly fine if a few small lumps remain in the batter.
Carefully fold in the fresh raspberries, taking care to distribute them evenly without crushing the berries.
Use a spoon or an ice cream scoop to divide the batter evenly among the muffin cups, filling each about two-thirds full to allow room for rising.
Place the filled muffin tin in your preheated oven and bake for 18-20 minutes, or until the muffins are golden brown on top. To check for doneness, insert a toothpick into the center of a muffin; it should come out clean.
Once baked, remove the muffins from the oven and let them rest in the tin for about 5 minutes. Then, transfer them to a wire rack to cool completely and ensure that they maintain their fluffy texture.
For a delightful finishing touch, if desired, lightly dust the cooled muffins with powdered sugar before serving to add an extra hint of sweetness.
Notes
For an extra touch of sweetness, dust with powdered sugar before serving.