Step 1

Preheat the oven to 350°F. Line 2 baking sheets with parchment paper.

Step 2

In a large mixing bowl, whisk together the flour, 2 cups of powdered sugar, baking powder, and salt.

Step 3

Cut the butter into tablespoons and drop the pieces into the flour mixture. Add the eggs and vanilla. Beat with an electric mixer on medium speed until combined. Add 2 drops of food coloring if desired, and beat until well incorporated, making sure there are no white streaks in the dough.

Step 4

In a small bowl, whisk together the cornstarch and the remaining ½ cup of powdered sugar.

Step 5

Scoop the dough into 1½ tablespoon-sized balls. Roll each between the palms of your hands to form a ball, then roll in the cornstarch mixture until well coated. Place each ball about 3 inches apart, on prepared baking sheets and slightly press down on the tops.

Step 6

Bake for 12 minutes or until the cookies start to crinkle and are lightly browned on the bottoms. Remove from the oven and immediately press a heart-shaped sprinkle or candy on each cookie. Transfer to a wire rack and cool completely. Cookies can be stored in an airtight container at room temperature for up to 1 week.