Preheat oven to 200 C bake or 180 C fanbake. Mix together flour and sugar in a large
bowl. Melt butter and mix egg and lemon rind and beat well with a wooden
spoon, to combine. Add liquides to dry ingredients and combine only until
the ingredients have been lightly mixed. Spoon into lightly greased muffin
tins. Bake for around 15 mins.
When muffins are cooked, stir together the topping and drizzle over the
hot muffins. Let them cool and take them out carefully, and place on a wire
cake rack.