1. Preheat your oven to 350°F (175°C).
2. In a large bowl, cream together the softened butter and sugar until light and fluffy.
3. Add the egg and vanilla extract, mixing until well combined.
4. In a separate bowl, whisk together the gluten-free flour, Jello powder, baking powder, and salt.
5. Gradually add the dry ingredients to the wet ingredients, mixing until a dough forms.
6. Roll the dough into small balls and place them on a baking sheet lined with parchment paper.
7. Flatten each ball slightly with the bottom of a glass.
8. Bake for 10-12 minutes or until the edges are lightly golden.
9. Allow to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.

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