This easy royal icing recipe for sugar cookies is SO ridiculously simple to make! No egg whites, no meringue powder, just four simple ingredients whipped up with a hand or stand mixer.
If you're planning to color this royal icing, I highly recommend using gel food coloring to get the most vibrant colors without thinning the icing too much. And a big thanks to Bakermom for sharing in the comments that using this white gel food coloring will help you create a true white royal icing that is perfect for Santa beards and such.