August 27th, 2015
Melt the candy coating in a microwave-safe bowl in 20-second intervals, stirring with a spatula after each one. Add the petal dust and stir until completely incorporated. (For a more intense color, add more dust.) Pour the candy into a plastic zip-top bag and snip a small hole in one corner. Fill each straw with the candy. Put the straws in the freezer until the candy is set, about 5 minutes.
Remove the filled straws from the freezer, and using the wooden dowel, push the hardened candy out of the straw. The "chalk" should slide right out. If still too soft, put it back in the freezer for another 3 minutes. Cut each chalk into three even pieces. Dust with confectioners' sugar for a chalky effect, if desired.
The chalk will keep in a plastic zip-top bag in a cool, dry place away from direct sunlight for up to 8 weeks.
NOTE: If you find the chalk really doesn't want to come out of the straw, use a craft blade (I use X-Acto) to carefully cut the straw down the middle, then remove.