Step 1
Knead the sugar-cookie dough and flour until smooth.
Step 2
Roll out the dough on a sheet of parchment paper to a 1/4-inch thickness. Print out the Rugrats Cookie Printable and use the template to make cookie shapes by cutting out the faces from the dough.
Step 3
Transfer the dough to a sheet pan lined with parchment paper and bake at 350°F until golden, approximately 10 to 12 minutes. Transfer to a wire rack to cool. Repeat with the remaining dough to make ten more cookies.
Step 4
To make the frosting, beat the confectioners' sugar, egg-white powder, and water in a medium bowl until the mixture is thick and smooth. Transfer a half cup of the frosting and tint it with black food-coloring paste.
Step 5
Spoon the frosting into a pastry bag fitted with a #2 plain writing tip or a resealable bag with a small corner snipped; set aside.
Step 6
Tint another half cup of the frosting pale pink and thin it slightly with a teaspoon of water so it has the texture of slightly whipped cream.
Step 7
Cover the cookies with the pink frosting and let them dry for about 45 minutes.
Step 8
Divide the remaining frosting into six small bowls. Tint each a different color, leaving one bowl plain white. Thin each color with a small amount of water.
Step 9
Using a small paintbrush and the colored frosting bowls as your palette, paint in the details of the Rugrats template: the hair, eyes, and bows. Let the frosting dry for about two hours.
Step 10
Using a pastry bag with a #2 tip, pipe in line detail with the black-tinted frosting and let it dry for 30 minutes until set.
Step 11
Cookies can be made up to one week in advance and stored in an airtight container.