Preheat the oven to 200°C (392°F) / Fan 180°C (356°F) / Gas 6.
Place muffin cases in a 12-hole muffin tin.
Place the flour and baking powder into a spacious bowl.
Rub the butter in the mixture using your fingertips until the mixture resembles fine breadcrumbs.
Stir in the sugar, blueberries, and the grated lemon rind.
Mix together the eggs and milk in a separate bowl blending the mixture quickly.
Spoon the mixture into the prepared muffin tins or paper cases, filling almost to the top.
Bake in the preheated oven for approximately 20–25 minutes. The muffins should be well-risen, golden, and firm to the touch.
Allow the muffins to cool for a few minutes in the muffin tin.
Transfer the muffins carefully to a wire rack to cool for a few more minutes.
Serve the blueberry muffins warm and enjoy!