Preheat the oven to 350° F. Line the baking sheet with parchment paper or a silicone mat and set aside. Add the butter and sugar to the bowl of a stand mixer. Cream until light and fluffy. Add the vanilla and egg. Mix well. Add red food coloring and mix. Sift together the flour, salt, baking powder, baking soda, and cocoa powder. Add to the mixture, stirring until just combined. Measure out 1 tablespoonful portions and roll into balls. Shake the powdered sugar into a bowl and roll the balls into it, coating evenly. Place balls onto the baking sheet and bake for 8-10 minutes. Let cool for 5 minutes.