Meltaway cookies are a soft, lightly sweet shortbread cookie that literally melts away in your mouth. Top it with a thin glaze and red and green sprinkles for a festive Christmas cookie treat.
In the bowl of a stand mixer with the paddle attachment cream the butter with the powdered sugar and cornstarch. Add vanilla. Mix well.
Combine the salt and flour. Add to the batter. Mix until dough clumps together.
Scoop cookie dough onto silicone lined baking sheets. Flatten dough balls with the bottom of a measuring cup dipped in powdered sugar.
Bake at 350˚F for 8 to 12 minutes until just set. Do not over-bake.
Whisk together the ingredients for the glaze adding extra milk 1 tsp at a time until desired consistency. (Keep it slightly thick, a little milk goes a long way.) Spoon on top of cooled cookies.
Immediately shake sprinkles on top of wet glaze. Allow glaze to harden. Store cookies in an airtight container up to 5 days.