Preheat the oven to 350°F (175°C). Line two baking sheets with parchment paper.

In a large bowl, combine the cake mix, softened butter, and eggs. Mix until a soft dough forms. Add green gel food coloring, a few drops at a time, until the dough reaches the desired shade of green.

Scoop out tablespoons of dough and roll into balls. Coat each ball in powdered sugar before placing them on the prepared baking sheets.

Bake for 8-10 minutes or until the edges are set. Press a red heart candy onto the center of each cookie immediately after removing them from the oven. Cool completely.