Whisk together dry ingredients in one bowl.
Mix wet ingredients (except lemon zest) in separate bowl.
Add the dry ingredients to the wet ingredients and stir until just moistened.
Fold in lemon zest.
Pour into greased muffin tin and bake at 350 for 20-22 minutes or until tops spring back when touched.
Let muffins cool on wire rack.
To make glaze:
Whisk all ingredients together.
You can add more hot water if the glaze is too think to whisk well.
Dip cooled muffins in the glaze and let sit on wire rack until glaze sets.
Makes 12 muffins.