How to Make Royal Icing

This How to Make Royal Icing recipe uses four egg whites gently warmed over a bain marie until just warm—safe to use raw—and then whipped with sifted icing sugar and lemon juice. The gradual addition of sugar while mixing ensures a smooth, thick icing. Lemon juice adds slight acidity, improving stability and flavor. Whipping continues until a thickened icing forms, suitable for flooding cookies. Additional powdered sugar can be added for thicker consistency if desired for decorating cakes or detailed piping.

The icing is stored covered with cling wrap touching the surface to prevent drying. Its hardened finish makes it ideal for cookies and decorative baking projects where a firm, smooth icing is needed.