In large bowl, whisk together cocoa powder, coconut flour, sweetener, and baking powder.
Cut cake into squares and transfer the squares to a large bowl. Crumble the cake pieces into fine crumbs with hands or fork. Stir in ChocZero Chocolate Syrup evenly into crumbs to moisten them so they can be shaped into balls.
Use a cookie scoop or spoon to measure out about 2 tablespoons of the cake mixture. Roll the mixture with your hand to form a ball and place it on a lined sheet pan.