Oven Preparation: Initiate by preheating the oven to a temperature of 350 degrees Fahrenheit. Meanwhile, prepare several baking sheets by lining them with parchment paper to facilitate easy removal of cookies and simplify cleanup.
Dough Formation: In the mixing bowl of an electric stand mixer, combine the dry cake mix with the vegetable oil and eggs. Set the mixer on medium speed and blend for approximately two minutes until the mixture is smooth and homogeneous.
Color Integration: Gradually introduce green food coloring to the mixture, continuing to mix until the color is uniformly distributed and reaches the desired intensity.
Dough Cooling: Transfer the bowl containing the dough to a refrigerator and chill for one hour, or place it in a freezer for about 30 minutes. The dough should be cool to the touch and firm enough to handle without sticking.
Forming Cookies: Remove the dough from cooling and shape into balls approximately the size of a golf ball. Roll each ball in powdered sugar until fully coated and arrange on the prepared baking sheets, ensuring at least two inches of space around each to accommodate spreading during baking.
Baking: Place the baking sheets in the preheated oven and bake for 10-12 minutes, or until the edges of the cookies are firm but the centers remain slightly soft and not shiny.
Final Touch: Promptly after removing the cookies from the oven, press a jumbo heart-shaped sprinkle into the upper right corner of each cookie to mimic the placement of a heart. This should be done while the cookies are still hot to ensure the sprinkle adheres properly.
Cooling: Allow the cookies to rest on the baking sheet for approximately five minutes before transferring them to a cooling rack. The cookies will continue to firm up as they cool.