Meringue powder royal icing (and how to fix icing that bleeds, craters, or won’t dry)
Meringue powder royal icing is the easiest way to get cookie icing that pipes clean lines, floods smooth, and dries hard enough to stack. It takes three ingredients: powdered sugar, meringue powder, and water. When it goes wrong (colors bleeding into each other, little craters, icing that’s still tacky the next morning), the cause is…