A Cookie Recipe that is
Printable, Bake-able, Edible
1 cup of flour
½ cup of powdered sugar
1 stick of butter
½ cup of honey
1 teaspoon of vanilla
¼ – ½ teaspoon of salt (optional)
Makes 10-15 50cc syringes print with Green luer lock.
Bake 7-12 minute @ 350 degrees F for Greg Wades 4″ cookie.
(Use finely ground the ingredients to prevent clogging)
Out of the 10+ iterations of cookie recipes, a shortbread cookie is the closest to a good resolution cookie. Making a cookie recipe that frostrudes is easy. Keeping the print resolution after baking is tough. [Video here]
Finding a balance between ease of printing and baking resolution while maintaining taste was the hardest part. By no means do I claim to understand all of the chemistry involved in a cookie recipe. I don’t think any organic chemist would claim an understanding of the cookie as a whole. What is apparent; is that any baking soda, or baking powder causes rapid expansion. And, any water in the recipe allows the cookie to slump down and spread out.
Trouble shooting colloidal suspensions (itty bitty particles floating in some sort of fluid).
Originally, back when I was printing with Crab gel. I thought bits of something, were clogging the frostruder. After working with the cookie dough recipes it became apparent that pulsing pressures are a great way to separate out a fluid from a colloid suspension. Which turns out to be a major hurdle in printing with composites like cookie dough. This property may come in handy later, for separating, oil from sand, nano particles from a polymer, or whatever. Regardless the separating is some sort of physical property, and others ran into this problem. The claystruders at unfold~fab have an article on their trial working with clay.
They worked under continuous pressure which largely by-passes this problem, this solution limits my designs, but the work they are doing at Unfold~fab is excellent.
Enjoy the recipe.