Zest. Rub lumps of white sugar over the peel of a lemon, and melt them in custard. This is a most delicate way of getting the flavor of lemon-peel.
Burnt Sugar Flavoring. Put one tablespoonful brown sugar into a pan ; stir it till it becomes dark as taffy. Add one cupful of boiling water; let it stand a minute. Use enough of it to give a good flavor and bottle the rest for use another time.
Syrup Flavoring. The syrup of quince, peach and other preserves, makes delicious flavoring for custard. A little jelly dissolved in custard also gives an agreeable flavor.