Preheat oven to 180 degree C. Line a Muffin tray with cupcakes cases.
Take a bowl, add in flour, sugar, baking powder and mix well. Set aside.
Now in a jug or another bowl, add milk, oil, egg, lemon zest and mix well.
Now pour this wet ingredients in dry and mix well. Add in chopped mangoes and fold gently, dont over mix.
Now scoop this batter on to the muffin moulds, top each muffin with some more diced mangoes .
Now put this in oven and bake for 35 to 40 mins, insert a tooth pick to see whether the cake is cooked, the tooth pick should come out clean.
Remove from oven and let it cool a bit.
Make the glaze by mixing icing sugar with lemon juice till it is smooth poiring consistency.
Spoon this glaze over the warm muffins and serve