Instructions

1. Preheat oven to 375 degrees. Line three baking sheets with parchment paper.
2. In a medium bowl, whisk together the flour, baking powder, baking soda, and ½ teaspoon of salt in a medium bowl. Set aside.
3. Using an electric mixer, beat together the butter, both sugars, and vanilla in a large bowl for 2 to 3 minutes, until light and fluffy. Add the yogurt (or eggs) and blend well. With the mixer on low speed, add the flour mixture in three additions, blending until just incorporated.
4. Divide the dough into 6 small bowls. Add a few drops of the food colouring to the bowls, one colour per bowl, and stir until the colour is incorporated. Divide the Smarties between the 6 bowls and stir them through.
5. Working with one colour at a time put about ½ teaspoon of the dough on 9 evenly spaced spots on one of the prepared baking sheets. Next put another ½ teaspoon of another colour of dough so it touches the first colour. Repeat until each cookie has all 6 colours and is about 2 inches wide.
6. Place the first tray of cookies in the oven while you work on preparing the second tray. Continue to bake/prepare the cookies, making sure to use a cooled baking tray when you’re preparing the cookies, until all the dough is gone.
7. Bake the cookies for 6 minutes. Make sure not to over cook them or the colours will start to fade.
8. Let the cookies cool completely before you store them in an airtight container.