01 -  Preheat oven to 350°F. Grease and flour an 8-inch square cake pan. 
 02 -  In a bowl, whisk together flour, baking powder, salt, and cinnamon. Set aside. 
 03 -  Using an electric mixer in a large mixing bowl, cream softened butter and granulated sugar until mixture is light and fluffy. Add eggs individually, beating well after each addition. Stir in vanilla extract. 
 04 -  Add half of the dry ingredients to the butter mixture and mix until partially combined. Pour in milk, then add remaining dry ingredients. Mix until the batter is smooth without overbeating. 
 05 -  Pour batter into prepared pan and bake for 25 to 30 minutes, or until a toothpick inserted into the center comes out clean. Allow cake to cool completely. 
 06 -  In a clean bowl, beat softened butter until creamy. Incorporate powdered sugar, whole milk, vanilla extract, and salt. Continue beating until frosting is smooth and fluffy. 
 07 -  Crumble cooled cake into a large bowl. Gradually add frosting, one spoonful at a time, mixing until the texture holds together but avoids excess moisture. Reserve some frosting if the mixture feels wet. 
 08 -  Roll the cake mixture into 1-inch balls. Arrange on a baking sheet lined with parchment paper. Freeze balls for 15 minutes to firm. 
 09 -  Melt candy melts in a microwave or double boiler following package instructions. 
 10 -  Dip the tip of each lollipop stick into melted candy coating, then insert halfway into a chilled cake ball. 
 11 -  Dip each pop into melted candy coating to fully cover. Tap gently to remove excess. Immediately sprinkle with cinnamon sugar, attach candy eyes, and embellish with assorted sprinkles, mini chocolate chips, or colored sugar to create monster features. 
 12 -  Place decorated cake pops upright into a Styrofoam block or cake pop stand. Allow coating to harden before serving.