In a medium bowl, whisk the flour, cocoa powder, baking powder, and salt.
In a bigger bowl, beat the butter and sugar until it’s light and creamy. This takes about a minute or two.
Scrape the bowl, then mix in the egg, vanilla, and food coloring.
Slowly add the dry ingredients and mix until the dough comes together.
Split the dough in two. Put each piece between plastic wrap and roll it out until it’s about 1/4 inch thick. Chill for at least an hour so it firms up.
Heat your oven to 350°F. Line your baking sheets with parchment if you want easy cleanup.
Take one dough sheet out at a time. Use a floured cookie cutter to make your shapes. Press the scraps together and keep cutting. If the dough gets sticky, pop it back in the fridge. Do the same with the second dough sheet.
Bake the cookies for 8–10 minutes, just until the edges feel set. Let them cool for 5 minutes, then move them to a rack to cool all the way.
Decorate with chocolate drizzle, royal icing, or cream cheese frosting — whatever your kids love.
Store the cookies in a single layer in an airtight container for up to a week.