How to make
Put the granulated sugar in a dry pan to caramelize while stirring. It needs to become a light caramel, then top it up with the hot water, while stirring constantly.
Allow everything to blend into a brown syrup and cool. Sift the powdered sugar into a bowl and pour in the syrup. Stir until glaze for the éclairs becomes ready.
This glaze is perfect for donuts, too.