Begin by preheating your oven to 350°F (175°C). Prepare two baking sheets by lining them with silicone mats or lightly misting them with baking spray, then set them aside.
In a spacious mixing bowl, beat together the softened butter and sugar until the mixture is light and fluffy, which usually takes about 2 minutes.
Next, incorporate the egg, red food coloring, and vanilla extract into the butter mixture, blending well until everything is combined.
Finally, gently mix in the cocoa powder, baking powder, and flour until a soft, uniform dough comes together. Be careful not to overmix!
Scoop rounded Tablespoon-sized portions of the dough, roll them into neat balls, and arrange them on your prepared baking sheets, leaving about 1 inch of space between each cookie.
Bake for approximately 9 to 11 minutes. For even cooking, rotate the baking sheets halfway through the baking time. The cookies should be set around the edges.
Allow the cookies to cool on the baking sheets for about 5-7 minutes. While they are still warm, gently press a peppermint Kiss candy into the center of each cookie.
You can serve these delightful cookies immediately while they're warm and gooey, or let them cool completely for about 2 hours for a firmer texture before storing or serving. Enjoy your homemade labor of love!