Nutrition information is calculated using an ingredient database and should be considered an estimate
Preheat oven to 350°F. In a medium bowl whisk flour, baking powder, cornstarch, and salt. Set aside.
Use an electric mixer to beat I Can’t Believe It’s Not Butter!® Original Spread and brown sugar until fluffy. Add egg and vanilla extract and continue to beat for a few minutes.
Reduce mixing speed to low and gradually add the dry ingredients until dough forms. Do not overmix.
Transfer dough to a lightly floured piece of parchment paper. Have a bowl of flour close by. Roll the dough with a floured rolling pin until 1/4'' thick. If the dough is sticky, dust with a little more flour. Cut rolled out cookies into desired shapes and transfer to a cookie sheet. Bake for 7 minutes. Remove from baking sheet two minutes after they come out of the oven. Wait until cookies are completely cool to decorate.
Whisk confectioners sugar, light corn syrup, and water in a bowl. Add more water if icing is too thick or stiff. Alternatively, add a little bit more confectioners sugar if icing is too runny.
To color icing, add a few drops of gel food color to bowl and mix well. Use a piping bag, small offset spatula, or the back of a spoon to decorate cookies.