Teacher provides a variety of holiday cookie recipes (some cookie examples are given on the page) and students double or triple the recipes. This activity works on adding or multiplying fractions at a very distracting time of the school year! Students can work together in groups or on their own. When I did this activity, I brought in a few of the recipes made at the end of the project. We shared the answers together and the student group that came the closest to the correct answers got to choose their cookies first!