This flavor of royal icing is so delicious that I want to put it on everything. It’s especially good to use around the fall time because it pairs so well with fall flavored sugar cookies. The best thing about it is that it’s no harder to make than my regular icing, because all we add is a little caramel extract.
½ cup + 2 Tbsp water, room temperature (if you use the full 4 Tbsp of corn syrup, you may not need the additional 2 Tbsp water)
1 tsp Diamond Crystal kosher salt (or ½ tsp regular table salt)
6 Tbsp meringue powder
2 lb. powdered sugar
1–2 tsp vanilla bean paste (or extract)
1–2 tsp Watkins caramel extract (I recommend starting lower and taste testing)
2–4 Tbsp light corn syrup (I use 85g, which is ¼ cup / 4 Tbsp)
white gel food coloring, optional
To the mixing bowl, add the salt, meringue powder, and water. Use a wire whisk to combine, making sure there are no lumps of meringue powder in the bowl. The mixture will be frothy on top with liquid on the bottom, kind of like beer.
Add the powdered sugar to the bowl all at once. Attach the bowl to the mixer fitted with the paddle attachment and mix on low to combine into a thick, syrupy icing. Add the vanilla, any other flavorings you are adding, corn syrup, and a squeeze of white gel food coloring. Mix again, raising the speed to medium (four on the Kitchen Aid) for three minutes. The icing will be thick, glossy, and fluffy.
Cover the icing with cling film immediately, touching the surface. You could also cover it with a moist towel draped over the bowl if you’re going to be using it immediately. If you’re making it ahead, store it in an airtight container.
The consistency of the icing will be a toothpaste/piping/detail consistency. Color it and thin it out as needed for decorating.
Find it online: https://linenandgray.com/salted-caramel-royal-icing/