In a large mixing bowl, combine the strawberry cake mix, melted butter, and egg. Stir until smooth, about 2-3 minutes.

Add softened cream cheese and blend until fully incorporated, about 2-3 minutes.

Cover and refrigerate the dough for at least 1 hour.

Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper.

Scoop tablespoon-sized portions of dough and roll them into balls.

If desired, roll dough balls in powdered or pink granulated sugar before placing on baking sheets.

Bake for 8-10 minutes, until edges are set but centers are still soft.

Remove from oven and let rest for 1-2 minutes, then press a chocolate kiss in the center of each cookie.

Transfer cookies to a wire rack to cool completely.