Step 1

Line a baking sheet with parchment paper and set aside.

Step 2

Combine the cake mix, vegetable oil, eggs, and vanilla in a large bowl. Add the green food coloring and mix well to incorporate it evenly.

Step 3

Set the dough in the refrigerator for 20 minutes.

Step 4

Preheat the oven to 350 degrees. Mix the confectioners sugar and cornstarch in a small bowl.

Step 5

Remove the dough from the refrigerator. Scoop dough into balls and roll them in the confectioners sugar mixture until completely coated.

Step 6

Set the balls on the prepared baking sheet. Lightly press down with the bottom of a glass to make the balls have a flatter surface. (Do not press too hard though).

Step 7

Add the candy heart to the top of the dough.

Step 8

Place the baking sheet in the oven and bake for 8-10 minutes. Do not overbake.

Step 9

Remove the baking sheet from the oven and let the cookies cool on a cooling rack.

Step 10

Serve warm or at room temperature.