In a small bowl, whisk the cocoa powder into the Greek yogurt until smooth.
1 cup Greek yogurt, 1 tablespoon unsweetened cocoa powder
Place sandwich cookies in a small bag, then use a meat mallet to smash the cookies until completely crushed.
4 chocolate sandwich cookies
Fill two small jars or bowls with the chocolate yogurt base, then top with the crushed cookie pieces. Place 2-3 gummy worms on top of each dessert cup, then serve immediately and enjoy