Set the oven to 400 degrees and adjust the rack position to the top third of the oven. Line a 12-cup muffin tin with cup-cake liners or spray it with baking spray
Sit the flour, sugar, cinnamon, and baking soda into a large howl. Put the milk in a separate bowl and stir in the egg, melted bater, and lemon zest. Pour the wet ingredients onto the dry ingredients and very gently, using a fork, stir them just until the four disappears. The muffins will be tough if you overmix the batter
Stir in the herries so they're evenly distributed
Fill the muffin cups three-quarters full and bake until golden broven on top, 20 to 25 minutes. Serve the muffins hot in a rupkon-lined basket with plenty of butter to spread on them,
