Preheat the oven to 350 degrees and line a baking sheet with parchment paper.
In a large mixing bowl combine sugar cookie mix, softened butter, egg, and water together. Mix until crumbly.
Once crumbly, add about 40 drops of green food dye (or until the color green of your preference).
Mix well until the color is fully combined and creates a soft dough. I used my hands to finish mixing the cookie dough to help it come together.
Use a 2-tablespoon cookie scoop to create heaping scoops of cookie dough (you can do level scoops and create more cookies, I just wanted my cookies thick).
Gently roll dough balls in the sugar and place them on the prepared baking sheet (do not press cookies down, keep them in balls so they bake thick).
Bake for 8-9 minutes. Immediately remove cookies from the oven and add 1 heart sprinkle to each cookie. You can also shape cookies with a cookie cutter or use your fingers to push the edges in a little.
Let the cookies cool on the baking sheet for 10 minutes before transferring them to a cooling rack.