These tender and blueberry-filled muffins will delight you. Large and with a crunchy top, they
Preheat oven to 375° F/ 190°C.
Whisk together the flour, baking powder and salt in a medium bowl and set aside.
Mix the milk and vanilla. Set aside.
Mash about 1/2 cup of the blueberries (about 32 & 1/2 ounces/70 g) in a small bowl. Add the lemon rind if using, and set aside.
Cream the butter and sugar at a low/medium speed for about 3-5 minutes if using an electric mixer, longer if doing it by hand.
Add the eggs one at a time, blending them in until fully incorporated. Then add the dry ingredients alternately with the liquid ingredients in about 2-3 batches each. Mix only until combined. Than fold in the mashed blueberries by hand, with the spatula.
Fold in the rest of the blueberries and spoon the batter into the lined muffin cups, spreading the liners out so no 2 muffins will touch each other. Use either 2 spoons or a spoon and the spatula to scoop the batter. For extra large muffins fill 10. For large muffins fill 12.
Top with sparkling sugar, Demerara (natural) sugar or a combination. Bake for 30 minutes. Allow the muffins to cool completely (for about 30-45 minutes) before gently removing them from the tins.
If you do not have 2 muffin tins (for 10-12 muffins spread well out), then bake these in batches. I suppose that you could bake 5 or 6 in 1 muffin tin spread out and bake the remaining batter in a loaf pan - that should work.