Stir the flour, baking powder, orange peel and salt together in a bowl.
Beat the butter and sugar together with an electric mixer.
Add in the eggs, milk and vanilla.
Stir the wet ingredients into the dry. Don’t over stir this, just blend them together.
Fold in the blueberries.
Spoon the batter into 12 muffin cups and bake at 400 degrees for 15-20 minutes.
Stir the ingredients for the glaze together.
Drizzle over muffins that have cooled a bit. They don’t have to be completely cool, but you don’t want them piping hot either.
I drizzled most of the muffins, but then decided to dunk a few too.