Make your own science party cookies and decorate them yourselves.
Put the sugar, butter, eggs, vanilla into a bowl. Cream them together. Add the flour, baking powder and salt. Fold in the ingredients until completely incorporated. lace the dough into the fridge to chill for 30 mins.
Heat your oven to 400 degrees F (200 degrees C or gas mark 6).
Roll out the dough onto a lightly floured surface. Roll the dough to a thickness of 3/8 inch (9mm). Make sure the cookies are even thickness or some will burn or be undercooked. Use a cooker cutter to cut out the shapes.
Gently place your cookies onto an oiled baking tray. Place the try into the oven. Cook until just barely gold around the edges. Remove from the oven and allow to cool before frosting.
Whisk the egg white and vanilla in a bowl or using a stand mixer. Beat until frothy. Slowly add in the sugar gradually. Mix gently until the sugar is incorporated. Then quickly whisk or turn up to high speed (if using a mixer) until the mix forms stiff peaks. Combine the egg whites and vanilla and beat until frothy. Add confectioners' sugar gradually and mix on low speed until sugar is incorporated and the mixture is shiny. Turn speed up to high and beat until mixture forms stiff, glossy peaks. Takes about 5 mins.
Add food coloring, if desired. For immediate use, transfer the icing to a pastry bag or heavy duty storage bag and pipe as desired. Use a #3 or #4 decorators tip for outlining the cookies. Add details to the letters by pulling the frosting with a toothpick. If using storage bag, clip corner. Store in airtight container (so that it does not harden) in the refrigerator for up to 1 week ( or the freezer for 1 month if tightly wrapped).
Element Cookies - shape my using a ruler to measure off squares with a ruler.
For any leftover unfrosted cookies - Store in airtight container in the refrigerator for up to 1 week (freezer for 1 month if tightly wrapped).
Note: Pasteurized eggs are said to be safer to protect against food-borne illness.